The utility model relates to an electric high-efficiency sprayer, which is used for spraying insecticides or spraying foliage fertilizers to various crops and plants with the height of 0.1 to 8 M. A miniature vertical type underwater reciprocating pump is arranged in a liquid storage tank; a gas chamber for regulating pressure is arranged on the bottom seat of a pump body at the liquid outlet part of a pump. The insecticide liquid in the liquid storage tank is continuously drawn into the pump body and is pressed into the gas chamber through a liquid inlet pipe which is connected to the liquid inlet of the pump by the miniature vertical type underwater reciprocating pump. After homogeneously and stably sent to a liquid infusion pipe which is connected with the gas chamber by the gas chamber, the insecticide liquid is spouted by a spray head. The utility model has the advantages of high effective delivery lift, insecticide saving, and less power consumption, and has the advantages that the super low-capacity atomization is reached, and the work efficiency reaches more than 70%.