Regulation is a high performance micro-and nano-porous structure (narrow pore size distribution, high throughput and low pollution, and so on) key element of polyvinylidene fluoride microporous membrane. At present, the preparation of PVDF microporous membrane principle is solvent-induced phase separation (Nips) and thermally induced phase separation (Tips), non-solvent-induced phase separation method typically produces larger finger holes, and finger-like presence is not conducive to the intensity of use of the film, and finger-like piercing increases the risk of surface defects.