The invention discloses an automatic nailing device for bamboo toys, and relates to the technical field of processing machinery for bamboo toys. The automatic nailing device comprises an outer frame. A fixing plate is fixedly connected with two sides of the inner wall of the outer frame and is positioned above slide rails, a pendulum bob device is fixedly connected with the left side of the top of the fixing plate, a driving air cylinder is fixedly connected with the top of the fixing plate and is positioned on the right side of the pendulum bob device, a driving piston is arranged inside the driving air cylinder, a push block is fixedly connected with the left side of the driving piston, a stamping block is arranged inside a driven air cylinder, a conveyor belt fixing frame is fixedly connected with a base of the outer frame, and a conveyor belt lifting device is fixedly connected onto the conveyor belt fixing frame and is positioned inside a conveying device. The automatic nailing device for the bamboo toys has the advantages that the problems of poor manual bamboo toy nailing work efficiency and large errors at present can be solved by the aid of the automatic nailing device, work labor can be reduced, the work efficiency and the nailing quality can be enhanced, and the aesthetics of the bamboo toys can be improved.