In the D-S evidence theory, conflicting coefficient cannot well depict the conflict between evidences, and counterintuitive results may be generated in the combination of highly conflicting evidence. Therefore, a self-adaptive conflicting evidence test and combination approach is proposed. Firstly, cosine between evidence vectors is used to measure the similarity degree, and conflicting evidence criterion is presented. The evidence is classified by conflict evidence detection coefficient. Then, the conflicting proportion coefficient is introduced to decide the modified method for the evidence, and the local modification or full modification is decided according to its similarity. Finally, the modified evidence is tested and combined. Application example illustrates the effectiveness of the proposed method.