The cable float liquid level controller is designed based on the principle of gravity and buoyancy. It mainly includes float body, high-capacity micro switch set in the float body, driving mechanism that can make the switch on and off, and three core cable connected with the switch. When the float rises or falls to a certain angle with the level under the action of liquid buoyancy, the driving mechanism in the float body drives a large capacity microswitch to output an ON or OFF signal for alarm prompt or remote control.