Slit extrusion type high-precision flat plate coating machine and method

The invention discloses a slit extrusion type high-precision flat plate coating machine and method, and belongs to the technical field of coating machines. The slit extrusion type high-precision flat plate coating machine comprises a workbench rack, and the coating machine further comprises an adsorption platform positioning device arranged on the workbench rack; a coating head Z-axis movement mechanism which is arranged on the workbench rack, is provided with a coating die head mechanism and drives the coating die head mechanism to do lifting motion in the Z-axis direction, wherein the coating die head mechanism is matched with the Y-axis direction movement of the adsorption platform positioning device to coat a workpiece; and a coating head cleaning device which is arranged on the workbench rack and matched with the coating die head mechanism, wherein the coating die head mechanism is cleaned through movement of the coating head cleaning device in the X-axis direction. The coating die head mechanism is conn