Corn threshing device

The invention discloses a corn threshing device. The corn threshing device comprises a base, the top end of the base is fixedly connected with a second thread and movably connected with a shell through the second thread, the outer wall of the shell is provided with a first thread and movably connected with a threaded sleeve through the first thread, and the side wall of the shell is provided witha guide groove; the inner wall of the threaded sleeve is provided with a second clamping groove which is movably connected with a clamping key, the clamping key penetrates through the shell through the guide groove and is movably connected with a threshing mechanism, the threshing mechanism comprises an upper cover, the bottom end of the upper cover is fixedly connected with a clamping hook, a threshing blade is fixedly installed on the inner wall of the upper cover, the upper cover is movably connected with a corn kernel storage box through the clamping hook, and a first clamping groove is formed in the outer wall of