Aimed at the demand for combat target information service in condition of modern high technology, the impor?tance of knowledge graph of target in battlefield is analysed in this paper, based on the basic concepts of knowledge graphtechnology. The framework of the knowledge graph construction of target in battlefield is proposed, some methods and tech?nical points such as data preparation and preprocessing, knowledge extraction, knowledge links are described, knowledgegraph technique application is prospected and some key technique is proposed. The paper studies knowledge graph tech?nique application for combat target information service basically, gets some experimental achievements with guiding signif?icance.