Abstract: This study provided the basic data for developing biopesticide and biofertilizer for exploiting biogas slurry，ultrafiltration technology by first used to concentrate Biogas slurry, and the composition concentrated liquor of to do a comprehensive analysis. Experiment,biogas slurry through the Ultra-filtration membrane under ordinary pressure.,he concentrated liquor was produced by cycle concentrated.Wo have analyzed Physical and chemical characteristics of biogas slurry,heavy metal content and volatilization composition of concentrated liquor were determinated.there were abundant nutriments in concentrated liquor,And heavy metal content of less than the standard limit.The volatilization of oncentrated liquor by a alcohol and alkyl and fat.This result can provide the base for the technology research on high value application of biogas slurry.