Wind load is the main control factor for ship mooring,so it is necessary to study the calculation of wind load acting on ship.In view of the calculation formulas and parameter values of the wind load acting on ship in the current water transport industry specification,we apply the method of theoretical deduction based on the basic expressions of wind load,analyze the parameters such as air density,variation coefficient of wind pressure height,ground roughness and windage area of ship combining with the adjustment of natural condition,and obtain the theoretical calculation formulas and suggestions.The results can provide references for revision of some parameters in the specification and engineering design.