Abstract:A multi-objective planning model for product line design of real estate projects under government constraints and project constraints was established, which included both floor-area ratio constraints, building density constraints and government price constraints, as well as time constraints, cost constraints and funding constraints. The proposed model was used to determine the product mix ratio, pricing and promoting strategy of real estate projects. Due to the complexity of the proposed model, the genetic algorithm was used to obtain the approximate optimal solution. Finally, a real estate project was used to test the practicability of the proposed model.