The invention relates to the technical field of marine product catching equipment, and discloses an automatic catching device for shallow water beach clams. The automatic catching device comprises a vehicle plate, front plates are fixedly installed between the front wall face and the rear wall face of the bottom of the left side of the vehicle plate, rear plates are fixedly installed between the front wall face and the rear wall face of the bottom of the right side of the vehicle plate, a rotating rod A is arranged between the bottoms of the two rear plates, wheels are fixedly installed on theouter wall of the rotating rod A, and a beating device is arranged between the two rear plates. According to the automatic catching device for the shallow water beach clams, a catcher holds and pushes the vehicle plate by hand to move on sand which just ebbs tide, the clams and sand bodies are integrally shoveled into a screen, then the beating device, a linkage device and a water splashing device are used in cooperation, so that when the catcher pushes the vehicle plate to move, the shoveled sand can be shaken off and scoured at the same time, clams screened out of the sand are finally left,the structures are used in cooperation and supplemented with each other, and the clam catching efficiency of catchers is improved.