Based on sails aerodynamics characteristics, route and monsoon, the available wind power resources around typical routes were analyzed by superposing conversion factor contour on wind power density nephogram. Firstly，the formula of wind energy density and wing-sail propulsion was derived, and conversion coefficient of propulsive work was put forward to evaluate wing-sail’s ability in using different wind energy. Then, combining the profile of wind power feature with  the contour of transformation coefficient，the analytical method of available wind power resources was put forward. Finally, taking NingboMiddle East route as example, the wind data in 2014 from ECMWF was used to analyze and calculate the available wind power resources. Results show that for different ship heading, there is much difference between the winter’s available wind power resources and the summer’s in the South China Sea. The W-E route should be adopted in summer and the E-W route should be adopted in winter. The characteristic of available wind power is similar in the Bay of Bengal and in the Arabian sea area, and it will be more efficiently if W-E route is adopted in summer.