propagate bioethanol. A breaking-through step happened recently in September, 2017 when the government,together with 15 departments, issued a proposal on boosting the growth of ethanol in China, named "plementation of ethanol gasoline for the expansion of biofuel ethanol production and promotion".It can be envisioned that,in the next two decades,ethanol fueled car will definitely be the optimal choice of vehicles. Yet,many server problem concerning the expanding of bioethanol in China still stood in the way.The biggest problem is the immaturity of car engines.Like electricity-powered cars, ethanol fueled cars rely heavily on the modification of engines so that it can working properly with a mix fuel of high percentage of ethanol.The society also gives rise to the concern of such setbacks that prevents ethanol cars from speedily developing in China. 5.Conclusion Bioethanol is itself a promising energy alternative in the future.A main usage for bioethanol is to serve as a substitute of petrol for road transportation vehicles.Bioethanol has many benefits and yet virtually no obvious setbacks.In addition,more and more countries have given their strategic priority of bioethanol fuels.In China,it still has a long way to go for bioethanol-poweredpropagate bioethanol. A breaking-through step happened recently in September, 2017 when the government, together with 15 departments, issued a proposal on boosting the growth of ethanol in China, named “plementation of ethanol gasoline for the expansion of biofuel ethanol production and promotion”. It can be envisioned that, in the next two decades, ethanol fueled car will definitely be the optimal choice of vehicles. Yet, many server problem concerning the expanding of bioethanol in China still stood in the way. The biggest problem is the immaturity of car engines. Like electricity-powered cars, ethanol fueled cars rely heavily on the modification of engines so that it can working properly with a mix fuel of high percentage of ethanol. The society also gives rise to the concern of such setbacks that prevents ethanol cars from speedily developing in China. 5. Conclusion Bioethanol is itself a promising energy alternative in the future. A main usage for bioethanol is to serve as a substitute of petrol for road transportation vehicles. Bioethanol has many benefits and yet virtually no obvious setbacks. In addition, more and more countries have given their strategic priority of bioethanol fuels. In China, it still has a long way to go for bioethanol-powered