Abstract: A coating die includes a die body and a regulation assembly. An accommodating cavity for accommodating a slurry is provided in the die body, and the die body is further provided with a coating gap communicating with the accommodating cavity and extending along a first direction. The regulation assembly includes a flow regulation member running through the die body along a second direction and capable of running into the coating gap. The regulation assembly further includes a drive mechanism, where the drive mechanism is connected to an end of the flow regulation member extending out of the die body so as to drive the flow regulation member to move along the second direction, and the drive mechanism is configured to be able to regulate displacement of the flow regulation member in the second direction according to coating weight information of a slurry flowing out of the coating gap.