Joint cutting device for building construction

The utility model provides a joint cutting device for building construction, and belongs to the technical field of building construction. The joint cutting device for building construction comprises a base, a water tank, an engine, a clutch wheel, a blade, a handle, a sleeve, a first push rod and a second push rod, the engine is installed on the base, the water tank is installed on the base, the clutch wheel is installed on the lower side of the base, the handle is fixedly connected to a handrail, the engine is installed on the base, and the blade is installed on an output shaft of the engine. A dustproof baffle is fixedly arranged on the outer side of the blade, the water tank communicates with the dustproof baffle, the two ends of the sleeve are the first end and the second end respectively, the first push rod is slidably installed at the first end, a rebound spring is installed between the first push rod and the first end, the second push rod is slidably installed at the second end, and the length of the s