In order to study the law of wind speed variation when typhoon lands on different terrains and its influence on the wind-resistant design of transmission lines, schedule monitoring of typhoon speed in different areas was carried out for four types of coastal areas in Fujian province based on automatic meteorological observation stations. The distribution law of maximum average wind speed and maximum wind speed was analyzed through mathematical statistics method, and the change law of wind speed from coastal area to inland during typhoons was analyzed in detail. The influence of topography on the distribution of typhoon speed was evaluated based on the damage investigation of transmission lines caused by typhoons in Fujian coastal area. Meanwhile, the influence scope of typhoon on Fujian coastal transmission lines was evaluated, and the suggestion for wind-resistant design of transmission lines within the influence scope was proposed. The results show that when typhoon lands on from the coast to the inland, it tends to decrease at first and then increase, and the wind speed obviously increases because of the rising effect from the first mountain.