Taking manufacturing enterprises, network platforms and middlemen as the main components of the online sales model of industrial products, in this paper analyzes and describes three kinds of sales alliances formed by different combinations: unilateral alliance, two-party alliance and three-party alliance.Shapley value method and the improved method considering the actual revenue weight are used to calculate the revenue distribution of MRO online sales alliance. The results show that the additional benefits of the three-party alliance are more than half of the sum of the additional benefits of any two parties, so that the benefits of all parties in the three-party alliance can reach the maximum value. The increase in the additional revenue of any two-party alliance will reduce the marginal revenue of the third party member. Moreover, the variable weight calculation method based on the four comprehensive factors of actual liability, risk, cost and loss rights and interests can make the income distribution among members of the online sales alliance more fair and reasonable, which is more conducive to the development of online sales in the field of industrial products.