The utility model provides an ultrasonic detection spring device. A probe angle converter is arranged at the lower part of a spring, the angle converter is arranged on a universal shaft, two sides of the angle converter are respectively connected with rotary handles, an ultrasonic probe is arranged at the upper part of the angle converter, and a detection data output line connected with the ultrasonic probe is arranged at the lower part of the angle converter. According to the ultrasonic detection spring device provided by the utility model, the conversion of probe angles is achieved by using the angle converter, so that flaw detection of the spring can be comprehensively performed without omissions, and a good flaw detection effect can be achieved; and the ultrasonic detection spring device is suitable for being applied as an ultrasonic spring detection instrument.