Abstract: Hit probability analysis and calculation method of multi-arrow canisters are studied. Arrow dispersion characteristics of multi-arrow canisters are discussed, and their mathematical models are constructed. The Monte-Carlo hit probability analysis simulation method of multi-arrow canisters is proposed. For a specific multi-arrow canisters, a calculation algorithm is programmed by the use of this method, and hit probability is calculated and the relationships between hit probability and the arrow distribution parameters are obtained. The simulation results can be used in engineering, and the Monte-Carlo method is proved to be an effective tool for multi-arrow canisters hit probability analysis.