The invention provides a coating device used for coating products to be coated. The coating device is characterized by comprising a carrier assembly and a coating assembly. The carrier assembly is used for fixing the products to be coated, and the products to be coated are extended in the first direction. The coating assembly is used for coating the products to be coated, and the coating assemblycan move back and forth in the second direction to be close to or away from the products to be coated and also can move back and forth in the first direction so as to carry out coating on different portions of the products to be coated. The coating assembly of the coating device can carry out coating on strips to be coated on the carrier assembly, accordingly, manual coating is replaced, and the coating efficiency can be improved.