Prefabricated slab casting mold

The utility model relates to a precast slab casting mould which is used for casting a concrete precast slab, the precast slab casting mould comprises four mould plates which define a rectangular mould cavity, each mould plate is provided with a plurality of preformed grooves at intervals, the upper ends of the preformed grooves are opened, and the positions of the preformed grooves in the two mould plates which are arranged oppositely correspond to each other in a one-to-one mode so that steel bars can be laid conveniently. A control rod is movably arranged on the outer side of the formwork, a plurality of check blocks corresponding to the reserved grooves in a one-to-one mode are fixedly connected to the control rod, and when the control rod moves in the length direction of the formwork, the check blocks move along with the control rod to shield or expose the upper portions of the reserved grooves. The main purpose of the utility model is to provide the precast slab casting mould which can quickly and effici