Aiming at the complex and changeable decision-making environment of selecting partners, a multi-attribute group decision-making framework of TODIM-PROMETHEE based on trapezoidal fuzzy number is proposed. Firstly, the application space of TODIM model was extended to intuitionistic trapezoidal fuzzy numbers, and the advantage of considering the risk preference of decision makers in TODIM was used to enhance the participation of decision makers in decision-making methods. Secondly, combined with the PROMETHEE ll method, the priority function was used to gradually compare the advantages and disadvantages of the two objects to solve the problem of complementarity between attributes, and the size of the net flow was used to determine the ranking relationship of all objects. Finally, the feasibility of this method was proved by an example. A new method is proposed for selecting partners.