On the premise of ensuring the excellent transparency of polycarbonate (PC) film, the improvement of UV resistance and abrasion resistance can greatly expand its application range. In this paper, a PA-nano TiO2/PC composite film was prepared by coating the PC film with polyacrylate/nano TiO2 blended emulsion (PA-nano TiO2) through spin coating process. The results of scanning electron microscopy and ultraviolet test showed that the nanoparticles in the PA-nano TiO2/PC composite film distributed uniformly, the surface of the film was uniform and dense, and the ultraviolet absorption was enhanced. The transmittance of the composite film was still the same as that of the high-transmittance PC film, with the highest light transmittance of 90%, maintaining excellent transparency. From the friction and wear test results, it could be seen that the friction coefficient of the composite film decreased, and the surface hardness increased from B to 2H after modification, showing better wear resistance ability. The results of ultraviolet aging test showed that the PA-nano TiO2/PC composite film had a lower aging degree, a lower degree of discoloration, and better anti-ultraviolet aging performance at the same aging time.