The invention relates to a device for ultrasonic inspection. The device comprises a lifting chair, a lifting rod, a mechanical arm and a controller. The lifting chair comprises a base, a fixing-side supporting frame, a driving mechanism, a lifting frame and a supporting plate. Guiding grooves are formed in the lower surface of the supporting plate, and guiding sliding blocks are arranged at the top ends of supporting rods on most-top layers of two shearing assemblies, and are assembled in the guiding grooves; the lifting rod comprises a second supporting base, a second lead screw and a second servo motor, a guiding sleeve is arranged outside the second lead screw, a lifting sleeve is arranged outside the guiding sleeve, and the mechanical arm is arranged on the lifting sleeve; the mechanical arm comprises a first joint, a second joint, a third joint, a supporting ring and a clamping piece, a first servo motor and the second servo motor are electrically connected with the controller, and a lifting-chair control switch and a lifting-rod control switch are arranged on the controller. The device has the advantages that the structure is simple, the standing height of patients is automatically adjusted, a probe can be supported, and the labor intensity of medical workers can be effectively reduced.