Mixed drying device applied to surface coating

The utility model relates to the technical field of mixing, and discloses a mixing drying device applied to surface coating, which comprises a main body, the upper surface of the main body is fixedly connected with two fixing plates, the upper surface of the fixing plate on the left side is fixedly connected with a machine bin, an air heater is arranged in the machine bin, and the output end of the air heater is fixedly connected with an air inlet pipe. The end, away from the machine bin, of the air inlet pipe is fixedly connected with a fixing column, the air inlet pipe communicates with the interior of the fixing column, a worker starts an air heater in the machine bin, generated hot air can be conveyed into the drying cylinder through the air inlet pipe, then the lithium-rich positive electrode material in the drying cylinder can be dried, at the moment, a motor is started, and the lithium-rich positive electrode material is dried. And the lithium-rich positive electrode material in the drying cylinder sta