Web service function is continually strengthened, and Web service quantity increases rapidly, it is urgent to solve the problem on automatic service matching and composition to meet service request. The service matching algorithm for bionic manufacturing domain-specific ontology is proposed in the paper. For this algorithm, the semantic similarity between two concepts is calculated according to the distance of two nodes corresponding to two words of service request and descr iption. The revised index for matching the key word is considered to emphasize the key parameter among service descr iption, and the matching accuracy is highly improved. The total matching degree of service is equal to the average of all semantic similarities between the service request and the service descr iption