The dynamic voltage restorer (DVR) design program based on one-cycle control inverter algorithm is presented. Aiming at the issue that DVR inverter output is disturbed by nonlinear and impact load, by combining PI regulator with one-cycle control, one-cycle control model of DVR three-phase H bridge inverter unit is established. The 32-bit floating-point DSP chip TMS320F28335 is taken as the core of hardware, the IPM module is used as power switch module of inverter unit, and the secondary side of coupling transformer is paralleled with solid-state relay, which flexibly insulates DVR from the grid. PWM interrupt service routine adjusts PWM output signal pulse wide in real time based on DVR one-cycle inverter algorithm to control inverter output. Main program uses a combination of open-loop control and closed-loop. The open-loop control achieves rapid compensation based on the mathematical model table in the first time. When compensation error is small, closed-loop control is adopted to improve the control precision and stability. The experimental analysis shows that the dynamic voltage restore has fast response speed, good compensation effect, high reliability and stable performance.