Abstract: The influence of the characteristics of outsourcing business on the decision-making of supply chain outsourcing mode is analyzed. Based on game theory, the outsourcing mode decision by whether the outsourcing business has a sales promotion role is studied, with several meaningful findings. When the outsourcing business does not have a sales promotion function, the manufacturer and the retailer have a common preference for the business outsourcing model in most cases. Even if the agreement is not met, both sides will hand over control, rather than compete against each other. When the outsourcing business has a sales promotion role, the two parties show opposite preferences for the business outsourcing mode in many cases, and there will be situations in which both sides no longer hand over control, but compete with each other. The difference in business costs between the business outsourcing partners of producers and retailers has an important influence on the preferences of the business outsourcing model.

Key words: supply chain, sales promotion, outsourcing mode, decision