Civil engineering deep foundation pit construction monitoring instrument

The utility model discloses a civil engineering deep foundation pit construction monitoring instrument which comprises a fixing box, supports are fixedly connected to the two sides of the fixing box respectively, an ultrasonic liquid level meter body is arranged at the bottom of the fixing box, a fixing plate is fixedly connected to the top of the ultrasonic liquid level meter body, and clamping rods are fixedly connected to the two sides of the bottom of the fixing box respectively. And clamping grooves matched with the clamping rods for use are formed in the two sides of the top of the fixing plate. Through cooperative use of the fixing box, the support, the ultrasonic liquid level meter body, the fixing plate, the clamping rod, the clamping groove, the transverse rod, the limiting rod, a reset spring, a limiting groove, a sliding rod, a sliding sleeve, a buffer spring, a handle, a transmission rod, a cam, a push plate and a movable rod, the ultrasonic liquid level meter has the advantage of being convenien