In the ultrasonic vibration system, matching circuit is often determined by parameters of the transducer, but it does not take into account the connection problems between the transducer and other equipment in the vibration system. In fact, dynamic resistor R1 will be changed when piezoelectric transducer is connected with the ultrasonic vibration system, the initial matching circuit can not make a good effect. Therefore, by using the two matching circuit condition and the relationship between R1 and the parameters, three electrical parameters of T type matching circuits are re optimized,and use Multisim software to simulate the optimized T matching circuit. The results indicate that the optimized T matching circuit makes the whole efficiency and active power of ultrasonic vibration system better than initial matching status under the condition of static matching.