Metal surface sand blasting and drying device capable of avoiding overlarge sand particles

The invention relates to the technical field of metal surface sand blasting devices, and discloses a metal surface sand blasting and drying device capable of avoiding overlarge sand particles. The metal surface sand blasting and drying device comprises a shell, a first shell is fixedly connected to the outer side of the shell, a second shell is movably connected to the interior of the first shell, a screw rod is rotatably connected to the interior of the second shell, the outer side of the screw rod is in threaded connection with a first fixing block, and the outer side of the first fixing block is fixedly connected with an impact plate. According to the metal surface sand blasting and drying device capable of avoiding overlarge sand particles, through connection of the shell and the impact plate, the problem that the spraying effect can be affected by wet gravels during sand blasting of a sand blasting device in the prior art is solved, before sand blasting, sand needing to be used is dried through mechanica