The invention discloses a pattern paint spraying mechanism and an anti-fog assembly thereof, wherein the paint spraying mechanism is applied to a paint spraying assembly line and can quickly spray paint to parts of plates. The paint spraying mechanism comprises a material pushing assembly and a positioning assembly, the front end face of the material pushing assembly is a material pushing surface,the rear end of the material pushing assembly is connected with a first push-and-pull device, the first push-and-pull device is fixed to a workbench and is used for pushing the material pushing assembly to do reciprocating motion in the direction perpendicular to a conveying belt of the assembly line, the front end face of the positioning assembly is a positioning surface, the rear end of the positioning assembly is connected with a second push-and-pull device, the second push-and-pull device is fixed to the workbench and is used for pushing the positioning assembly to do reciprocating motionin the direction perpendicular to the conveying belt of the assembly line, and the material pushing assembly and the positioning assembly cooperate with each other and are used for positioning the laminated plates; and the anti-fog assembly comprises paint spraying chambers which are arranged in sequence, the bottom walls of the paint spraying chambers are arranged in a step shape, hollowed-out to-be-painted patterns are correspondingly arranged on the bottom walls of all the paint spraying chambers, and the anti-fog assembly further comprises an anti-fog cover which covers the anti-fog assembly.