Double Door Vertical Type Vacuum Coater is operated by the principle of evaporation with resistance heating that can be used for coating metallic films and gold-imitative films on the pre-treated plastics, ceramics in order to obtain bright and good-looking plastic or ceramic products with moderate price. This machine is extensively used in the fields of industrial arts, decoration or upholstery, toy-making, etc. Its double doors structure enables the operation of work piece feeding-discharge and coating simultaneously. So the work efficiency is highly elevated. The machine equipped with high-vacuum oil diffusion pump, roots pump, sliding valve pump composed of vacuum pump group, is the superior equipment for bulk production.