Coating device

The utility model discloses a coating device which is used for coating a base material with slurry to form a slurry layer. The coating device comprises a coating die head and a pressure applying unit; wherein the coating die head comprises at least three coating units, and a coating slit and a slurry outlet which are communicated with each other are formed between every two adjacent coating units; a coating gap is formed between the slurry outlet and the base material; the pressure applying unit is used for applying pressure pointing to the first direction into the coating gap; and the base material moves towards a second direction relative to the coating die head, and the first direction is opposite to the second direction. According to the application, after the coating gap is widened, the coating die head with the multi-layer coating capability can still coat a relatively light and thin slurry layer.