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Based on the DSP, a kind of induction heating power supply of high frequency is designed. The switching element is IGBT. The control technology of PID adopted can adjust the power in time. The application of digital phase-locked loop technology in high frequency occasion which is based on DSP and DPLL makes the phase lock has fast dynamic property and steady-state performance of high precision. It realizes reliable load frequency tracing and reliable inverter mode control. At the same time, it increases work efficiency and power factor of the inverter. Thus, it helps achieve the purpose of promoting the digital control of high frequency induction heating power supply. It guarantees the heating efficiency, stability and anti-jamming capability in the system. In a word, it is of high utility value.