The invention discloses a control valve capable of outpouring color paste in large amount or in trace amount. The control valve comprises a valve body and a valve element; the valve body is provided with a big pump inlet and outlet, a small pump inlet and outlet, a color paste barrel inlet and outlet and a color paste outlet, wherein the color paste barrel inlet and outlet is communicated with a first color paste barrel branch inlet and outlet through a first branch channel and communicated with a second color paste barrel branch inlet and outlet through a second branch channel; the valve element is provided with an axis channel, a first radial channel, a second radial channel and a third radial channel are communicated with the axis channel respectively, the surface of the valve element is provided with an arc groove channel, and the axis channel is communicated with the small pump inlet and outlet through a channel. According to the control valve, the structure is compact, the design is exquisite, and the purpose of outpouring the color paste in large amount or in trace amount can be well achieved by rotating the direction of the valve element; meanwhile, the purposes of cleaning pump bodies and preventing the color paste in a color paste flow pipeline and at the color paste outlet from drying and hardness can be achieved, air entering the pump bodies or the valve body can be exhausted conveniently, and precision of outpoured color paste is effectively guaranteed.