In the process of tennis match, the referee’s decision is the most important. The referee wants to ensure the accuracy of the judgment, reduce the misjudgment and missing of the sentence,this paper puts forward the need for the referee to improve his attention on the spot. Tennis umpire has always been the patron saint of tennis match, maintaining the fairness on the court, and silently controlling all aspects of the court. The tennis umpire is the law enforcer to ensure the smooth progress of the tennis match, and in the course of the match, the tennis referee’s attention on the spot directly affects the accuracy of the court decision, therefore, the factors affecting the attention of the referee on the spot should be carefully analyzed in order to improve the judgment and judgment’s attention on the spot. The tennis umpire should make clear attention characteristics of the referee and the linesman, and strengthen the key training in the process of judgment and punishment, and sum up the factors that affect the referee’s attention in the field through the way of participating in more games，and must have the pertinence to carry on the training, and thus overcome the influence factor.