Building forcible entry equipment based on the water cutting technology comprises a crawler-type walking chassis, a rotary table, a control room, an adjusting arm and a water cutting spray head. The rotary table is installed on the crawler-type walking chassis, and the control chamber is integrally installed on the rotary table. The adjusting arm is located at the top of the control chamber, one end of the adjusting arm is hinged to a top shell of the control chamber, the water cutting nozzle is installed at the other end of the adjusting arm, and the auxiliary clamp is additionally installedbetween the adjusting arm and the water cutting nozzle and connected with the adjusting arm through a rotary joint; a water supply connector of the water cutting nozzle is connected into the control chamber through a water supply hose which is arranged along the adjusting arm. A water tank, a motor, a booster pump, an abrasive storage tank, a mixer and a controller are arranged in the control chamber; a groove type linear guide rail is fixedly installed on the palm portion of the auxiliary clamp, a ball screw is arranged in the groove type linear guide rail and driven by a motor, a nut slidingblock is installed on the ball screw, and the water cutting spray head is fixedly installed on the nut sliding block.