In this paper,an aeronautic tested DC/AC inverter based on a Micro-computer Unit(MCU) is introduced.The DC/DC boost unit is push-pull circuit controlled by UC3846,which can restrain the magnetic bais of the push-pull transformer and enhance the dynamic load response. The SPWM control pulses are produced by P87LPC768.This inverter has the merits of simple structure,small volume,high output-stablity and easy to be adjusted.The test waveform is present at the end of this paper.