The invention relates to the technical field of microorganisms, and mainly relates to mycorrhiza fungi FM001 separated from roots of wild blueberry in the south of Changbai Mountain. The bacterial strain is preserved at the general biology center of China Committee for Culture Collection of Microorganisms on August 18, 2010, with the preservation number of CGMCC No. 4108 and the classification name of Irpex lacteus (Irpex lacteus). The bacterial strain has an application in promoting growth and promoting N, P and K absorption effects on blueberry cultivation. The invention has the purposes that root development and growth of blueberry are promoted through application of related products, the N, P and K absorption effects are improved and the yield of the blueberry is improved.