Assembly type pre-positioning stair

The utility model relates to an assembly type pre-positioning staircase, and belongs to the technical field of assembly type staircases, the assembly type pre-positioning staircase comprises a support frame, a plurality of steps, a connecting assembly and a positioning assembly, the support frame is provided with an upper pedal and a lower pedal, and the plurality of steps are detachably connected to the support frame through the connecting assembly; the positioning assembly comprises a positioning ring block, a movable part and a positioning sleeve rod, a mounting hole is formed in the upper pedal, the positioning ring block is rotationally connected with the upper pedal in the mounting hole, one end of the movable part is arranged in the positioning ring block, the other end of the movable part is connected with the positioning sleeve rod, and the movable part stretches out and draws back in the radial direction of the positioning ring block; and the embedded bolts on the upper ladder beam are arranged in t