The invention relates to a cam control system and mainly solves the problem that the action of an oil cylinder is unreliable due to hard seal of a control system oil line used by a conventional wet spraying machine. The cam control system is characterized in that: cams (3), (4), (5) and (6) are arranged on a shaft (9); valves (11), (12), (13), (14), (15) and (16) arranged on a cam base (2) correspond to the cams, wherein the valve (11) corresponds to the cam (3), the valve (12) corresponds to the cam (4), the valves (13) and (14) correspond to the cam (5), and the valves (15) and (16) correspond to the cam (6); and meanwhile, the valves (11), (12), (13), (14), (15) and (16) are connected with corresponding oil cylinders respectively; the valve (11) is directly connected with an oil tank, the valve (12) is connected with oil cylinders (17) and (18), and the valves (13), (14), (15) and (16) are connected with oil cylinders (19), (20), (21) and (22) respectively. The cam control system has the characteristics of no need of sealed oil line and reliable action of the oil cylinders.