The width can be customized in the range of 80~2800mm, and the thickness range is 0.04~0.22mm. The special milky white masterbatch and formula are selected. It has higher whiteness than ordinary milky white film, and has the characteristics of good hiding, less crystal points and high strength. Uniform thickness and smoothness, excellent coating processing performance, suitable for milky white protective film substrates with higher requirements for hiding.