谢谢。在控制中心 设置我已会了。改动也已改回了，但是菜单还没变回来。

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos3'
if [ x$feature_platform_search_hint = xy ]; then   search --no-floppy --fs-uuid --set=root b0966204-8426-4a76-b950-eacf00a55c4a
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=1280x1024
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='hd0,msdos3'
if [ x$feature_platform_search_hint = xy ]; then   search --no-floppy --fs-uuid --set=root b0966204-8426-4a76-b950-eacf00a55c4a
fi
insmod gfxmenu
loadfont ($root)/boot/grub/themes/deepin/ag-NotoMono-Regular-0-16.pf2
loadfont ($root)/boot/grub/themes/deepin/ag-NotoSansCJK-Regular-2-14.pf2
loadfont ($root)/boot/grub/themes/deepin/ag-NotoSansCJK-Regular-2-16.pf2
insmod jpeg
insmod png
set theme=($root)/boot/grub/themes/deepin/theme.txt
export theme
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=5
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=5
  fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
        set gfxpayload="${1}"
}
set linux_gfx_mode=
export linux_gfx_mode
menuentry 'Deepin 15.9.1 GNU/Linux' --class deepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-b0966204-8426-4a76-b950-eacf00a55c4a' {
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos3'
        if [ x$feature_platform_search_hint = xy ]; then           search --no-floppy --fs-uuid --set=root b0966204-8426-4a76-b950-eacf00a55c4a
        fi
        linux        /boot/vmlinuz-4.15.0-29deepin-generic root=UUID=b0966204-8426-4a76-b950-eacf00a55c4a ro  splash quiet  DEEPIN_GFXMODE=$DEEPIN_GFXMODE
        initrd        /boot/initrd.img-4.15.0-29deepin-generic
}
submenu 'Advanced options for Deepin 15.9.1 GNU/Linux' $menuentry_id_option 'gnulinux-advanced-b0966204-8426-4a76-b950-eacf00a55c4a' {
        menuentry 'Deepin 15.9.1 GNU/Linux, with Linux 4.15.0-29deepin-generic' --class deepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-29deepin-generic-advanced-b0966204-8426-4a76-b950-eacf00a55c4a' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos3'
                if [ x$feature_platform_search_hint = xy ]; then                   search --no-floppy --fs-uuid --set=root b0966204-8426-4a76-b950-eacf00a55c4a
                fi
                linux        /boot/vmlinuz-4.15.0-29deepin-generic root=UUID=b0966204-8426-4a76-b950-eacf00a55c4a ro  splash quiet  DEEPIN_GFXMODE=$DEEPIN_GFXMODE
                initrd        /boot/initrd.img-4.15.0-29deepin-generic
        }
        menuentry 'Deepin 15.9.1 GNU/Linux, with Linux 4.15.0-29deepin-generic (recovery mode)' --class deepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-29deepin-generic-recovery-b0966204-8426-4a76-b950-eacf00a55c4a' {
                load_video
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos3'
                if [ x$feature_platform_search_hint = xy ]; then                   search --no-floppy --fs-uuid --set=root b0966204-8426-4a76-b950-eacf00a55c4a
                fi
                linux        /boot/vmlinuz-4.15.0-29deepin-generic root=UUID=b0966204-8426-4a76-b950-eacf00a55c4a ro recovery
                initrd        /boot/initrd.img-4.15.0-29deepin-generic
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-9B40B7158BA1F777' {
        insmod part_msdos
        insmod ntfs
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then           search --no-floppy --fs-uuid --set=root 9B40B7158BA1F777
        fi
        parttool ${root} hidden-
        chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_os-prober-benfen ###
menuentry 'Windows 7 (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-9B40B7158BA1F777' {
        insmod part_msdos
        insmod ntfs
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then           search --no-floppy --fs-uuid --set=root 9B40B7158BA1F777
        fi
        parttool ${root} hidden-
        chainloader +1
}
### END /etc/grub.d/30_os-prober-benfen ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/35_deepin_gfxmode ###
insmod deepin_gfxmode
deepin_gfxmode
### END /etc/grub.d/35_deepin_gfxmode ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

以上为grub.cfg


以下为grub

# Written by com.deepin.daemon.Grub2
DEEPIN_GFXMODE_ADJUSTED=1
DEEPIN_GFXMODE_NOT_SUPPORTED=2560x1440
GRUB_CMDLINE_LINUX=""
GRUB_CMDLINE_LINUX_DEFAULT="splash quiet "
GRUB_DEFAULT=0
GRUB_DISTRIBUTOR="`/usr/bin/lsb_release -d -s 2>/dev/null || echo Deepin`"
GRUB_GFXMODE=1280x1024
GRUB_THEME="/boot/grub/themes/deepin/theme.txt"
GRUB_TIMEOUT=5


对，有两个os-prober

谢谢大神的回复，大神给了我神级的提示。
解决方法如下：
当时改名/etc/grub.d/30_os-prober"为"08_os-prober",时，我对这个文件做了个备份，把08改为30时，没有删除这个备份。
就有了两个os-prober.现在我把备份删除了。再更新grub，没有了。问题解决了。