Abstract: On the basis of template and elect roless methods , NiCo/ PTFE magnetic composite membranes were prepared with N₂H₄ as reducing agent . The paper studied the optimum preparation conditions and characterized st ructures and magnetic properties of the membranes by DSC , SEM , XRD , VSM. The result s show that magnetic composite membranes with susceptibility of 0. 16 cm³ / g have ferromagnetic property (M_s = 83. 38 Am² / kg , M_r = 29. 31Am² / kg , H_c = 111. 47 Oe) , which are obtained f rom solution of 0. 14 mol/ L Co²⁺ , 0. 06 mol/ L Ni²⁺ , 1. 00 mol/ LNaOH , 0140 mol/ L N₂H₄ at 70 ℃and 70 min. Magnetic Ni and Co particles appear in the pores and on the surfaceof PTFE membranes , and no chemical bonds are found between magnetic particles and membranes. The compositemembranes have int rinsic properties of sof t magnetic material.