Abstract: In order to adapt to the distributed low voltage photovoltaic（PV） power generation system, this paper presented a single phase integrated Boost photovoltaic inverter without transformer and leakage currents. The proposed inverter combines the Boost DC-DC converter with the traditional voltage source inverter by multiplexing the Boost power device, which can realize the function of inverter and voltage Boost relative to DC source by unified modulation. In addition, the structure of the inverter has the characteristics of direct connection between the negative side of the DC input side and the neutral point of the AC output side. Therefore, the voltage of the parasitic capacitance on the PV array is constant,which can effectively suppress the generation of leakage current, thus improving the reliability and power generation efficiency of photovoltaic power generation. The working principle of the Boost inverter was analyzed in detail, and the uniform modulation method of the switch tube was given, and the expression of voltage gain was derived. Finally, the experimental prototype was used to verify the experiment, and the experimental results verified the correctness of the theoretical analysis.