Water-drop-shaped outer package vacuum coating device

A water-drop-shaped outer package vacuum coating device relates to the field of coating and comprises a coating machine body, a coating cavity is formed in the coating machine body, an air cylinder is fixedly arranged on the upper end face of the coating machine body, the telescopic end of the air cylinder penetrates into the coating cavity and is fixedly provided with a positioning plate, and a fixed base plate is fixedly arranged on the lower end face of the positioning plate; the fixing base plate and the positioning plate are detachably arranged, a ventilation cavity is formed in the fixing base plate, and adsorption connecting blocks are fixedly distributed on the lower side wall of the ventilation cavity at equal intervals. The vaporized coating liquid is sprayed out through the spray head and then forms a spiral upward shape in the coating cavity, so that the flowing speed and diffusivity of the vaporized coating liquid in the coating cavity are greatly improved, the texture of a coating film is more u