A method of multi-sensor track association based on set pair analysis (SPA) and Dempster Shafer (DS) evidence theory is presented. In consideration of systematic error, the track information between different sensors is handled in the form of set pair based on the SPA closeness, and the expression of connection degree between tracks is built. On the basis of the closeness degree of set pair, the matrix of closeness degree is constructed. The problem of track association is solved by DS evidence theory. The example shows that this method can solve the question of multi sensor track association preferably.