1. As a kind of biological energy, the main component of biodiesel is the low-carbon alkyl ester mixture with high fatty acid transformed from the animal and plant grease, the physicochemical property of which is similar with the petroleum diesel and can replace the petroleum diesel directly or replace via dissolving in the common petroleum diesel with any ratio. Compared with the petroleum diesel, the biodiesel transformed from the animal and plant grease is superior in environment protection and hazardous waste emission, besides, because the petroleum resource is very limited, the market price of crude petroleum and fuel oil fluctuate sharply. Biodiesel is a type of renewable energy. With the acceleration of trend of diesel vehicle, the demand of diesel will be higher in the future, but the petroleum resource is gradually drying up and the consciousness of environmental protection is improving, which promote the development speed of diesel to replace the fuel all over the world, especially in 21st century, biodiesel has attracted great attention of each country due to its superior environmental protection performance.     2. The equipment of biodiesel mainly includes the pretreatment equipment, pre-esterification equipment, esterification equipment, rectification and fractionation equipment, filtration equipment, recovery equipment, separation equipment, heat exchanging equipment, heating and condensation equipment. Upon cooperating with main scientific research institutes in Beijing and Wuxi Grain Science Institute, our Company has researched and developed various biodiesel equipments with depending on the capability of Wuxi machinery processing, which are applicable to various animal and plant oil and various production process. Moreover, the vehicular equipment of biodiesel researched by our Company recently has already been successfully and exported to Africa. The experiment and test equipment of biodiesel manufactured by us is also widely recognized by many scientific research institutes, and the large-scale biodiesel equipment, the yearly yield can be up to ten thousand tons, has been smoothly put into production in many places.