Abstract: Screening antifungal actinomycetes are the foundation of agricultural antibiotics exploitation. The antifungal activity of 8 strains actinomycetes were studied by flat confrontation, one strain named K2 was got by mycelim growth rate, its antimicrobial spectrum was studied and strains identification with mycelim growth rate. The result of mycelium growth rate showed that K2 had a broad spectrum inhibitory activity to all the tested 10 plant pathogenic fungi. Among these, activity against Fusarium oxysporum was the highest with inhibition rate of 57.38%. The results based on morphological characteristics, physiological and biochemical characterization and 16S rDNA sequence analysis of strain K2 showed that it was possibly Streptomyces. The K2 strain displayed a broad spectrum inhibitory activity, which had great potential for controlling plant pathogens.