Microporous hollow fiber membranes containing anion exchange group and chelate forming group were prepared by radiation-induced graft ploymerization of glycidylmethacrylate(GMA), subsequently the epoxy group produced in the GMA-grafted hollow fiber membranes were converted into anion-exchange groups by reaction with diethylamine(DEA), TEA(Triethylamine), and into chelate forming group by reaction with DEtA(Diethanolamine), N-MG(N-Mthylglucamine). The boron(B) solution was forced to permeate across the hollow fiber DEA, TEA, DEtA, N-MG membrane. These fiber were evaluated to measure the pure water flux and the adsorption capacity of boron(B) ions. The pure flux of decreased rapidly with introducing graft chain to base polymer. The N-MG membrane having higher adsorption capacity than DEA, TEA, DEtA membrane.