Shear key reserved block of prefabricated and assembled integral shear wall

The invention discloses a shear key reserved block of a prefabricated and assembled integral shear wall. The shear key reserved block comprises a block body and a raised part which is arranged on the back surface of the block body. The section of the block body is of the shape of a trapezoidal dam body. The two ends of the block body are respectively provided with a cylindrical hollow structure for penetrating two steel reinforcements in the same vertical plane among horizontal steel reinforcements at an upper layer and a lower layer. The shear key reserved block of the prefabricated and assembled integral shear wall has the advantages that the structure is simple, the shear key reserved block can be cyclically used and is convenient to assemble and disassemble, the operating time on a production line is saved, and not only a shear key groove is reserved, but also the problem that holes on side forms for penetrating steel reinforcements leak grout is solved.