Based on the typhoon forecasting and the strength random variables of distribution component pole, this paper proposes a wind speed based failure rate calculation model for distribution component pole. This model can calculate the failure rate of distribution network components under different wind speeds. The reliability level of the highest wind speed section during typhoon landing of distribution system is calculated by the sequential Monte Carlo simulation method combining existing feeder and load partition theory. In the simulation process, the real time failure rate of the components and the dynamic alternation characteristics of operation-fault-operation are considered. The calculation results provide theoretical basis for reinforcing the distribution network project and some guidance for the differential design and plan of power distribution network in the future. Finally, the IEEE RBTS BUS6 F4 feeder is taken as an example to be calculated using Matlab, and the results show the correctness and effectiveness of the method.