Method for carrying out hollow fiber membrane surface hydrophilic modification by using biological agent

The invention relates to a method for carrying out hollow fiber membrane surface hydrophilic modification by using a biological agent, comprising the steps of (1) immersing a hollow fiber membrane in isopropanol and pure water to finish wetting treatment; (2) adding dopamine powder into a buffering solution to prepare a dopamine solution; (3) immersing the immersed hollow fiber membrane into the dopamine solution; placing the two ends of the hollow fiber membrane out of the solution and utilizing air to carry out aeration and agitating reaction; and then washing to be clean, and sealing and packaging. The method only coats and modifies on the membrane surface and does not change the structure of the membrane; the operation is simple, and the industrialized production is easy to realize; the prepared hollow fiber membrane is anti-ageing, chemical-washing-resisting and high-temperature-resisting; the hollow fiber membrane can be prepared into a curtain type or pipe type membrane assembly and can be applied to t