Abstract： A novel multi-sensor information fusion method  combined with the support vector machine (SVM) was proposed  in diagnosing three types of faults  which are collision, front collision and obstruction, as the robot’s arm approaches the grasping place.   After fusing the proper number of the data from multisensors and searching the optimal parameters C and γ of the SVM by grid searching, the proposed method can successfully diagnose the faults of obstruction, front collision and collision. Besides,  the selection of the number of the features of data to be fused by multisensor information fusion was discussed. The experimental results show that the selection of the proper number of the fusing features of the sampling data influences the number of fusion data obtained and the accuracy of classification.