It is the hot spot that how to improve the utilization rate of Pt on membrane electrodes. In the present study, the PtCuLaOx composite membrane electrode materials were fabricated on the surface of graphite fibrous cloth by ion beam sputtering (IBS). The phase composition and the surface structure of PtCuLaOx membrane were tested by X-ray diffraction (XRD) and atomic force microscope (AFM). The cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were used to analyze the influence of different acid treatment conditions on the membrane electrocatalysis performance in a tri-electrode system. The results indicate that the PtCuLaOx membrane grain sizes are in the scope about 30 nm, and after acid treatment they become bigger. The sample acid-treated at 50 °C for 30 min in the solution of H2SO4 (0.5 mol/L) has the best electrochemical activity surface area (ESA) and exchange current density (i0). Its platinum loading capacity is only 0.0802 mg/cm2, and has very high ratio of performance to price.