Coating jig stable in clamping

The utility model discloses a coating jig with stable clamping, which relates to the technical field of coating jigs, and comprises a base, a shell, a containing disc, a pressing cylinder component and a clamping component, the pressing cylinder component and the clamping component are arranged on the base, the clamping component is arranged on one side of the pressing cylinder component, the shell is sleeved on the outer wall of the base, the containing disc is arranged on the base, and the clamping component is arranged on the base. And the base is located in the center. According to the coating jig stable in clamping, the first pressing cylinder, the second pressing cylinder and the third pressing cylinder are arranged to be matched with one another, a workpiece on the containing table is pressed and fixed from the upper portion, then the workpiece is fixed again through the fixing base on the sliding rail, fixing is more stable, and the coating process is more accurate; the base is arranged in the shell,