In order to improve the stability of the power inverter converter of the lamp, this paper has built a model and analyzed the parameter. Firstly, analyze each switch state based on selfdriven lamp inverter converter. Then establish each state space expression and build the model of the power inverter converter, and process the average and the DC and AC small signal. Finally, simulate and analyze the model in the frequency domain to get the device parameters’ effect to the power system stability and working conditions. This theoretical analysis provide a basis for postparameter optimization, the optimization selection of inverter converter device will increase the stability of the lamp inverter converter and reduce energy loss of power devices.