Aiming at the problems (low efficiency,lacking processing safety,and so on) of traditional dehydration method,the mechanism of pervaporation (PV) technology was analyzed. The types and performances of the membranes and their applications in dehydration of ethanol/water mixtures were retrospected. The development of dehydration of hydrazine fuels by PV was reviewed. The results show that PV can overcome the shortages of traditional dehydration method of hydrazine fuels. According to the particular properties of hydrazine fuels,chitosan,ceramic and zeolite are used for suitable membrane materials for dehydration of hydrazine fuels by PV. Multi-level PV set in series can improve the dehydration efficiency. The key fields about dehydration of hydrazine fuels by PV include: recovery of hydrazine fuels from diluted aqueous solutions; dehydration of high concentration hydrazine fuels; and development of high-performance membrane materials.