The utility model provides a pipeline coating cleaning and clamping machine tool. The pipeline coating cleaning and clamping machine tool comprises a clamping mechanism, an axial displacement mechanism, a circumferential rotating mechanism and a support. The support comprises a tail end support body, a lower beam and a front end support body. The two ends of the lower beam are connected with the tail end support body and the front end support body. The clamping mechanism comprises clamping hydraulic oil cylinders arranged on the front end support body and clamping hydraulic oil cylinders arranged on the tail end support body respectively. The axial displacement mechanism comprises main hydraulic oil cylinders arranged between the front end support body and the tail end support body. A driving support of the circumferential rotating mechanism and front end covers of the main hydraulic oil cylinders which are arranged on the front end support body in a penetrating mode are fixed. A driving motor is fixed to a plate body, close to the driving support, of the front end support body and connected with a reduction gearbox. The reduction gearbox is connected with a transmission shaft. The transmission shaft penetrates through a driving fixing disc to be connected with a pinion. The pinion is meshed with a large gear. Spray nozzle adjustment devices are arranged on the two sides of the lower end of a guide wheel groove. Spray nozzles are arranged on the spray nozzle adjustment devices. Pipeline coatings can be efficiently cleaned away.