Fabricated reinforced concrete prefabricated stair for house building construction

The utility model discloses an assembly type reinforced concrete prefabricated staircase for house building construction, which belongs to the technical field of prefabricated staircases and comprises a prefabricated staircase main body and two connecting tables, one side of the prefabricated staircase main body is connected with a wallboard, and a plurality of steps are integrally formed on the upper surface of the prefabricated staircase main body in an injection molding manner; the two ends of the prefabricated stair body are erected on the two connecting tables correspondingly, a plurality of inserting grooves are formed in the upper surfaces of the connecting tables, the bottom face of the prefabricated stair body is connected with a plurality of inserting blocks inserted into the inserting grooves correspondingly, and the two ends of the prefabricated stair body abut against extrusion plates correspondingly. The end, away from the prefabricated stair body, of the extrusion plate is connected with a plur