Low-power consumption light-thin type medium/small-sized sound wave touch screen

The invention relates to a lower-power consumption light-thin type medium/small-sized sound wave touch screen. According to the technical scheme provided by the invention, the lower-power consumption light-thin type medium/small-sized sound wave touch screen comprises a touch screen body and an initiative detection circuit, wherein the initiative detection circuit is positioned on the upper surface of the touch screen body and is used for detecting the touch operation, and a plurality of passive watching sensors are arranged under the touch screen body, the passive watching sensors are connected with the initiative detection circuit. When the touch screen body is operated and the passive watching sensors are triggered, touch trigger signals can be output to the initiative detection circuit by the passive watching sensors, thus the initiative detection circuit can be accessed to an initiative detection state from a dormant state, and the touch operation on the touch screen body can be detected through the initiative detection circuit; and after the touch operation is finished, the initiative detection circuit returns to the dormant state. The lower-power consumption light-thin type medium/small-sized sound wave touch screen disclosed by the invention has the advantages that the structure is compact, the thickness of the touch screen body is reduced, and the touch detection in low power consumption and high accuracy can be realized.