Phosphate/potassium(K/P)solubilizing and IAA secreting strains of endophytic fungi were isolated from dicranopteris dichotoma as part of preponderant ferns growing in potassium deposit. And their growth promoting function on crops was researched. K/P solubilizing endophytic fungi were isolated and identified using morphological and cultural characteristics and 5.8S，18S rDNA ITS sequence analysis. The K/Psolubilizing capacity of strains were measured by Petri dishes and broth medium experiments. The growth promoting effect of strains on corn seedling was studied using tieback technology and soil pot experiment. Result showed that 42 strains of endophytic fungi were screened from dicranopteris dichotoma. There were two stains(MQ013，MQ039)among them with the ability of dissolving P/K and secreting IAA. Strain MQ013 was identified as Aspergillus awamori,and MQ039 as Aspergillus niger. The experiment of plant growth promoting function showed that strains MQ013，MQ039 effectively improved the content of chlorophil,potassium and phosphate in body of corn plant. It was concluded that MQ013 and MQ039 have a certain capacity of solubilizing P/K and secreting IAA,and have a significant growth promoting effect on corn seedling.