The invention relates to a reflection type adjustable ultrasonic probe, comprising a piezoelectric probe, a wedge block and a
coupling agent, wherein a square groove is formed on the upper end face of the wedge block, the bottom surface of the square groove is a cambered surface, the
coupling agent is placed in the square groove, the end part of the piezoelectric probe stretches into the
coupling agent, the piezoelectric probe is rotationally connected with the wedge block, the piezoelectric probe comprises a shell, and a protective film, a piezoelectric
wafer, a damping block, a cable and a joint, which are arranged in the shell in sequence, the protective film is arranged at the end opening of the shell, the piezoelectric
wafer is correspondingly arranged above the protective film, the damping block is correspondingly arranged above the piezoelectric
wafer, the joint is arranged in the middle of the top end of the shell, and the two ends of the cable are electrically connected with the piezoelectric wafer and the joint, respectively. The reflection type adjustable ultrasonic probe can be used for changing the incidence angle of ultrasonic wave by adjusting the inclination angle of the piezoelectric probe, so that the
adaptation range of the probe is expanded.