Very strange, I just solved this problem. By replacing the map_async as starmap_async, but i don't know the reason.
I guess it may be due to some reason that my error TypeError: read_image_task() missing 2 required positional arguments: 'image_directory' and 'queue' was not displayed, and the read_pool 4 processes were interrupted with this error, and then print 123 is normally.

This error is not printed, and Pycharm doesn't break in this error. . .