The invention discloses a restrictive mold pressing mold for ultrasonic vibration auxiliary demolding and a grain refinement method, and relates to mold machining and manufacturing and an applicationmethod thereof, in particular to a mold capable of enabling workpieces to obtain large accumulation strains and a process method for refining material grain sizes. The restrictive mold pressing mold comprises a mold frame, an ultrasonic auxiliary demolding device and a mold cavity. The ultrasonic auxiliary demolding device and the mold cavity are mounted in the mold frame together. The novel restrictive mold pressing mold for ultrasonic vibration auxiliary demolding and the grain refinement method have the beneficial effects of being novel in structure, easy and convenient to machine and operate, good in workpiece adaptability, uniform in strain distribution and small in wear, facilitating demolding and the like, and integrating economic performance and practicality.