Liquid level controller

The invention discloses a liquid level controller. The liquid level controller comprises a liquid inlet chamber and a control chamber; the liquid inlet chamber is hollow, a top baffle plate is arranged at a top end, and a lower end is opened; connecting pipes and a liquid inlet hole are arranged at the lateral of the liquid inlet chamber; a piston, a pull rod, a spring, a lower magnetic block, anupper baffle plate and a lower baffle plate are arranged in the middle of the liquid inlet chamber; shrapnel is fixed on an inner wall of an opening at the lateral, a cross bar is arranged at a lowerend of the shrapnel, a part of one end of the cross bar is located in the liquid inlet chamber, and the lower part of the part is a shape with an arc curve; the other part of the cross bar is elasticand is located in the control chamber; an upper clamping plate is arranged at the lower part of one end, in the control chamber, of the cross chamber; the control chamber is hollow, and provided witha roof plate and a bottom pl