As one of the most important characteristics, the pointing accuracy of the antenna directly affects the observation and tracking performance of the antenna. In order to meet the task requirements and improve the analysis accuracy of antenna and satellite ground link, this paper systematically analyzes the meaning of influencing factors of each component on pointing error. Based on the distribution characteristics of the model parameters, a probability distribution model of antenna pointing error is proposed, which can be used to improve the analysis method of antenna pointing error. Finally, the characteristics of antenna pointing error angle under the approximate modified Rayleigh distribution are analyzed and calculated by using typical parameters, which can provide a reference for the subsequent statistical distribution analysis of satellite ground link.