Improved high-pressure testing machine

The utility model relates to the technical field of pressure testing, in particular to an improved high-pressure testing machine which comprises an upper clamp and a pressure testing machine frame body, an adjustable limiting device is arranged in the pressure testing machine frame body, and the adjustable limiting device comprises a base and a rack frame. A second electric telescopic rod is arranged on one side of the gear, a limiting switch, a rack, a rack frame, a fixing frame, the second electric telescopic rod, the gear, the lower clamp, a rotary disc and the base are matched, the rotary disc rotates to drive the gear to rotate, and the gear rotates to drive the rack to move up and down through the rack frame. Through cooperation of the motor, the rotating arm, the first electric telescopic rod, the scraping plate and the rotating seat, the surface of the lower clamp is cleaned through a replaceable brush at the lower end of the scraping plate, and after the surface of the lower clamp is clean, the press