Road optimization and reasonable arrangement of wind turbines have an important impact on the construction cost of wind farms. In order to effectively reduce the construction cost of wind farms, the Jensen wake model in this paper optimizes wind turbine locations, comprehensively considering Dijkstra's method, contour tree search method and Prim method. This paper proposes an automatic optimization method of roads in wind farms based on the arrangement of wind turbines. Under the principle of the shortest path, a Y-shaped fork road scheme that is closer to the actual project is obtained by improving the Prim method, which effectively reduces the engineering volume and cost of the road in the field.