The invention relates to a mold pressurization core improved structure. The mold pressurization core improved structure comprises a hollow core handle and a core rod. A transitional reinforcing part is arranged at the front end of the hollow core handle. A fixing part is arranged at the tail end of the core rod. A hollow channel where the core rod is arranged in a penetrating mode is formed in the hollow core handle. The hollow channel comprises a penetrating part at the front end, a locking part in the middle and an auxiliary penetrating part used for making it convenient for the core rod to penetrate in. The mold pressurization core improved structure is composed of two parts, the core rod part likely to break is clamped and fixed through the hollow core handle, and therefore the whole mold pressurization core improved structure is not likely to break; besides, replacement is convenient, it is only needed to replace the core rod part once the core rod part breaks, and therefore the production cost is greatly reduced.