The invention provides an ultrasonic scanning probe, which comprises a shell (3), a transducer (13), a transducer support (14), a probe body (8), a half bevel gear (11), a shaft bevel gear (26), a spur gear (20), a dual internal gear (17), a planetary gear train, a motor gear (19) and a drive motor (9). In the ultrasonic scanning probe , the defects of forceless inducer swing and ununiform scanning process can be solved, required high torque in a limited space can be obtained, the weight of the probe can be reduced, meanwhile, in terms of a sealing scheme, the ultrasonic scanning probe is strictly sealed, and therefore can meet waterproof and dustproof requirements, the shell is made of soft rubber and hard rubber by rubber-coating injection molding, an upper shell and a lower shells of the probe are solidified by adopting epoxy glue, a glue groove for containing the glue and a glue line are designed between the upper and the lower shells of the probe, consequently, the firmness and reliability of the structure can be guaranteed, and tightness and safety can be sufficiently ensured as well.