The invention discloses a paint spray device for paint-spraying the surface of a workpiece. The paint spray device comprises a paint spray module and a workpiece support module. The paint spray device comprises a moving rod, a first rotating shaft, a horizontal rod and spray guns, wherein the first rotating shaft and the horizontal rod are perpendicularly connected at both ends of the moving rod, the spray guns are arranged at both ends of the first rotating shaft, both ends of the horizontal rod are arranged on a support, and the horizontal rod is arranged above the first rotating shaft; the workpiece support module comprises a second rotating shaft and a workpiece assembling rack fixed onto the second rotating shaft, wherein the workpiece assembling rack is connected with a workpiece support, the workpiece support is arranged right above the spray guns. The moving rod can move horizontally on the horizontal rod through a servo motor and can move vertically in a direction perpendicular to a workpiece; the second rotating shaft is arranged on a rotating table, and the rotating table rotates to drive the second rotating shaft to rotate. The paint spray device achieves rapid paint spray and is good in paint spray effects, low in floor occupation and space-saving, operators can timely detect the quality of paint-sprayed products, and the spraying effects can be enhanced.