A　high　efficiency　full-bridge　converter　is　designed　and　implemented　in　this　paper.　The　measured　data　result　from　the　other　converter　implemented　by　IC　UCC3895　compares　with　that　of　the　previous　converter.　This　full-bridge　converter　of　phase　shift　soft　switching　can　obtain　about　92%　power　efficiency　in　conversion　procedure.　This　design　used　L-C　resonance　circuits　to　achieve　power　switch　tube　soft　switching.