The invention provides a visualization device for an ultrasonic transmission process, belongs to the field of photoelastic mechanics, and aims at overcoming the problems that the existing photoelastic instrument can meet only the requirement of static photoelastic observation and measurement, the transmission characteristic of the ultrasonic wave in solid can be partially displayed, or real-time control cannot be carried out, as well as observing and measuring the ultrasonic transmission imaging in the solid. The device comprises a pulse generator, an ultrasonic transducer, a signal processor, a photoelastic system and a signal amplifier. Compared with the prior art, the device has the advantages that an ultrasonic exciter and an LED light source can be synchronously controlled; the stroboscopic time, driving pulse width and amplitude of the LED light source can be adjusted; in addition, the delay time can be automatically changed after remaining for a period of time in each delay, and therefore, the transmission of the ultrasonic wave in one cycle can be quantitatively observed and measured.