The calculating method of the operational effectiveness of laser angle deception jamming is obtained by analyzing the whole jamming process of the laser angle deception jamming system. Then, by analyzing the factors affecting the success rate of laser angle deception jamming, the corresponding probability is obtained and the operational effectiveness of laser angle deception jamming is finally calculated. The analysis and calculation of operational effectiveness can provide a decision guidance for laser angle deception jamming commanders to better implement laser angle deception jamming, so as to enhance the operational effectiveness of the laser angle deception jamming system.