The utility model relates to a two sensing ultrasonic wave liquid level switch, include that the electronic control device in the stainless steel shell is used for receiving the liquid level probe that the electronic control device sent ultrasonic signal with connecting below the electronic control device, the liquid level probe is inside division notched cylinder column structure on the outer disc, inside transmission sensor and the receiving sensor of being equipped with respectively of recess relative up -down face, transmission sensor and receiving sensor passing signal line are connected with the electronic control device. The utility model discloses a transmission sensor and receiving sensor's setting makes its reliability service, not influenced by viscidity, the accurate effective and signal transmission distance weak point of measuring result, and sensitivity is high, to meet customer needs.