The invention discloses a gardening mowing robot capable of adjusting the mowing height, which comprises a body, universal wheels are fixedly installed at the four corners of the bottom of the body, and a first groove is opened at the center of the bottom of the body. The top of the inner wall of the first groove is fixedly connected with a telescopic spring, and the bottom of the telescopic spring is fixedly connected with a first fixed plate, and the left and right sides of the first fixed plate are fixedly connected with a first U-shaped plate, and the U-shaped plate A first rotating rod is movably connected to the inner surface of the first rotating rod, and a pulley is fixedly connected to the surface of the first rotating rod. In the present invention, a gear, a gear plate, a rope, a second motor, a second rotating shaft and a running wheel are arranged, the second motor is a forward and reverse motor, and the second switch is turned on to make the second motor work and the second rotating shaft to rotate. The running wheel rotates, so that two ropes are wound on the running wheel, and the gears on both sides of the fixed block can move up and down on the tooth plate, and the height of the cutting tool can be adjusted.