Semantic dependency analysis is practicable way to semantic analysis. This paper describes a Chinese semantic dependency analysis system using HowNet. The system takes sentences with phrase syntactic information as input. First, it determines the headword of each phrase to get the dependency structure of the sentence. Second, it takes the syntactic constituent as the basic unit of semantic labeling and determines the semantic relation through searching HowNet and Semantic Information Structure Library.We randomly extract 100 sentences from Penn Chinese Treebank as test data. There are totally 2783 pairs of word. The system determines the semantic relations of 2546 pairs.The labeling ratio is 91.5%.