The invention provides antistatic polyester films improved antistatic and optical property, which laminated at least one antistatic layer by means of pipelining coating on monoeder or dieder of the polyester film and laminated light diffusion layer by means of off-line coating on the antistatic layer. When the polyester film is used as light diffusion film of LCD, uniform antistatic property can be obtained, reducing charging caused by scaling and without degradation of optical property as separation on high temperature and high damp.