The utility model discloses a cable passage pumping system, programmable logic controler and delay relay install respectively in the control box, are provided with power input end, first contactor output, control circuit zero line end, the 2nd control circuit zero line end, second contactor output, earthing terminal, the first signal input, the 2nd signal input part and the 3rd signal input part on programmable logic controler respectively, lower limit water level sensor, middle level sensor, upper limit level sensor are connected with programmable logic controler's the first signal input, the2nd signal input part and the 3rd signal input part electricity respectively, the utility model discloses the advantage is: showing and reducing the consumption and drawn water the cost, the ten minutes is energy -concerving and environment -protective, has improved the life of water pump.