NOVELTY - New genetically engineered strain for producing succinic acid, comprises: Escherichia coli BA205 strain having preservation number of CCTCC M2011447.    USE - For producing succinic acid (claimed), which is useful in fields of medicines, pesticides, dyes, oil paint, and in food and plastic industry; and for synthesizing 1,4-butanediol, tetrahydrofuran, gamma -butyrolactone, and poly(para-benzoquinone(PBQ))-biodegradable material.    ADVANTAGE - The Escherichia coli BA205 strain lacks lactate dehydrogenase (LDH) gene, pyruvate formate-lyase (PFL) gene and phosphoenolpyruvate carboxylase (PPC) gene activity, and has over expression of phosphoribosyltransferase with PPC. These result bacteria having excessive expression nicotinic acid, can effectively use glucose to grow, and produces succinic acid by anaerobic fermentation, whereas the prior art method for producing succinic acid involved cultivation in presence of oxygen. The method for construction of Escherichia coli BA205 strain is simple and convenient. The strain is easy to industrialize, requires E. coli normal culture medium, and has strong acid producing ability, which greatly reduces production cost and improves economic benefit. Thus overcomes the prior art inability of the BA204 strain to use the glucose and enhances application range of the strain.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) method for construction of the Escherichia coli BA205 strain having preservation number of CCTCC M2011447 involving: using bacterial strain of colibacillus lacking lactate dehydrogenase (LDH) gene and pyruvate formate-lyase (PFL) gene activity as starting strain, removing phosphoenolpyruvate carboxylase (PPC) gene through homologous recombination, and excessively co-expressing PPC and phosphoribosyltransferase to obtain Escherichia coli BA205 strain capable of effectively using glucose to produce succinic acid; and (2) method for fermenting using the Escherichia coli BA205 strain to produce succinic acid, involving: two-stage fermentation method, including production of biomass in aerobic stage, and performing fermentation to produce succinic acid in anaerobic stage.