Abstract: The halloysite nanotubes polyethersulfone (HNTs-PES) composite membranes were successfully prepared through non solvent induced phase separation (NIPS). The structure of formed membranes was investigated using scanning electron microscopy together with the corresponding performance such as water flux, rejection rate, hydrophilicity and mechanical strength. Results show that the addition of halloysite nanotubes changes the structure of the asymmetric membranes from sponge like structure to finger like structure, and the water flux of composite membranes are all lower than those of raw membrane at coagulation bath temperature 40 ℃. The water flux increases with the increasing of coagulation bath temperature when wHNTs=2%. While the rejection rate and hydrophilicity increase at the expense of reduction of mechanical strength with the increasing of halloysite mass fraction from 2% to 8%.