The invention provides a prefabricated concrete pipe culvert mold detaching machine. The prefabricated concrete pipe culvert mold detaching machine comprises a portal frame, suspension beams, track assemblies, traveling motors and mold detaching mechanism racks, wherein the two suspension beams parallel to each other are fixed to the top of the portal frame; the track assemblies are fixed to the inner sides of the two suspension beams; the traveling motors are fixed to the mold detaching mechanism racks; the output ends of the traveling motors are matched with the track assemblies; the mold detaching mechanism racks are further provided with shifting fork elevating levers, lifting air cylinders and mold detaching shifting forks; the fixed ends of the lifting air cylinders are hinged to the mold detaching mechanism racks, and the movable ends of the lifting air cylinders are hinged to one ends of the shifting fork elevating levers; and the middles of the shifting fork elevating levers are hinged to the mold detaching mechanism racks, and the other ends of the shifting fork elevating levers are hinged to the upper portions of the mold detaching shifting forks. The prefabricated concrete pipe culvert mold detaching machine can meet the requirement of a production assembly line, and the automation degree is greatly improved; and the procedure demand is met, accurate positioning is achieved, the opening or closing speed of a production line mold is greatly increased, labor input is reduced, and the production cost is reduced.