Expansive concrete post-cast strip crack control device

The utility model relates to the technical field of concrete post-cast strips, in particular to an expansive concrete post-cast strip crack control device which comprises a first baffle and a second baffle which are used for restraining and limiting the two sides of concrete, and limiting frames are arranged at the two ends of the top of the first baffle and the two ends of the top of the second baffle correspondingly. A limiting rod is connected between the two limiting frames at each end in a sliding mode, a positioning assembly used for fixing is arranged on each limiting frame, and a shielding plate used for shielding the top of concrete is arranged between the two limiting rods. The post-cast strip has the advantages that the possibility that the post-cast strip cracks due to expansion of the expansive concrete after pouring is completed is reduced, and the durability and the structural safety of the post-cast strip are improved. 本申请涉及混凝土后浇带技术领域，尤其是涉及一种膨胀混凝土后浇带裂缝控制装置，其包括用于对混凝土两侧进行约束限制的第一挡板和第二挡板，第一挡板顶部的两端