The utility model relates to die structure technical field discloses a concrete slab die structure convenient to demould, including bottom plate, the top of bottom plate is fixedly connected with a plurality of guide posts, the outer wall of guide post is fixedly connected with the mounting panel, the top of guide post is fixedly connected with the top plate, the top of top plate is provided with the ejection mechanism, the outer wall of left guide post is provided with the cleaning mechanism, the cleaning mechanism is used for washing, the top of mounting panel is fixedly connected with the demoulding cavity, the ejection mechanism includes the air cylinder, the bottom of air cylinder is fixedly connected with the top of top plate. In the utility model, the mixed concrete that stirs well is poured into the demoulding cavity, the telescopic rod is elongated, the scraper is removed to make it is wiped flat, the bidirectional screw rod is rotated through the opening motor, the left and right side vibration plate is back and forth to knock the demoulding cavity, breaks its cohesive force, reaches its quick demoulding function, reduces manual operation, and the practicality is enhanced.