Abstract: To encourage the firmswithmerits and prevent the enterprises from gaining colossalprofits, the problem of jointoptimal decision-making of supply chain constructed by cooperative suppliers and submitters in the situation ofhaving no discountwas discussed. A jointoptimaldecision-makingmodel of the supply chainwith restraint factorswas setup using the linearweighted sum approach. Onlywhen some firms in the supply chain have the tendency ofmaking colossal profits or only when they exert great influences on the supply chain, can thismodel and the relevantstrategies be taken so as to avoid the supply chain’s risk. The feasibility of thismodelwas verified through an example.