With research results concerned with mesocyclone for reference,especially the related content of MDA(Mesocyclone Detection Algorithm) from NSSL(National Severe Storm Laboratory),we present an improved MDA and the mesocyclone identification module in the Doppler Weather Radar Second Production software.Using the Doppler data of 27th May 2002 in Anhui Province,we compare our results with the mesocyclone products produced by Build 10.8 of METSTAR.The results show that our products have the same warning effect as Build 10.8.