Abstract: Single-phase non-isolated inverters are widely used in low-power photovoltaic grid-connected systems due to their advantages of small size, simple structure, low cost, and convenient control. Since single-phase non-isolated photovoltaic inverters need to overcome the common problems of common-mode leakage current and double-frequency power oscillation, they are usually designed as an AC and DC common ground structure, and also needs to add energy storage elements such as inductors and capacitors to buffer the double-frequency power oscillation. The addition of energy storage elements, especially discrete inductors, has the disadvantage of low utilization of the magnetic core, which is not conducive to the improvement of the power density of the inverter. Aiming at this problem, a single-phase non-isolated photovoltaic inverter based on magnetic integration is proposed. The influence of magnetic integration on inverter performance and the design principles of magnetic integration components are analyzed in detail. Finally, the effectiveness of the proposed magnetic integrated inverter is verified by simulation.