Spray gun control switch and spray gun capable of adjusting water discharge volume

The invention relates to a spray gun control switch which comprises a water inlet connector, a valve seat, a switch valve core and a pushing steering component, wherein the water inlet connector, the switch valve core and the valve seat are connected in sequence; the pushing steering component is connected with the switch valve core; the pushing steering component is subjected to linear operation to drive the switch valve core to rotate; when the pushing steering component is in a closed gear, a waterway from the water inlet connector to the valve seat is blocked; when the pushing steering component is in an open gear, the waterway from the water inlet connector to the valve seat is unblocked; and when the pushing steering component pushes from the closed gear to the open gear, the flow of the waterway from the water inlet connector to the valve seat ison the increase. A spray gun capable of adjusting water discharge volume adjusts water discharge volume through the control switch. According to the spray gun