The utility model provides a bipolar high-power pulse ultrasonic generator designed according to the ultrasonic theory and the high-frequency electronic technology. The bipolar high-power pulse ultrasonic generator is mainly used for ultrasonic detection of media, such as concrete dams and key nuclear power pressure vessels, of high scattering capability. A single-chip microcomputer is used for generating control signals, and a full bridge is driven by a bridge-type drive circuit, so that the purpose of controlling the charging and discharging of a capacitor is realized, a pulse excitation circuit is controlled to output a di-pulse signal with required pulse duration, and the di-pulse signal passes a di-pulse transformer to ensure that the impulse amplitude is greatly improved. Compared with the conventional mono-pulse signal generator, the bipolar high power pulse ultrasonic generator has the advantage that the flaw detection depth and precision are greatly improved.