Abstract: Aiming at the equipment procurement problem,a two-party procurement model with the purchaser and the contractor as the main body and a three-party procurement model with the purchaser,the main contractor and the sub contractor as the main body are established.Based on the dynamic evolutionary game theory,the strategy selection and game equilibrium of each subject under the two procurement models are analyzed,and the game evolution process is dynamically simulated and analyzed by numerical simulation using AnyLogic.In the game model of both parties,the evolutionary equilibrium strategy of the contractor is not actively perform the contract.The three-party game model can make the main contractor actively perform the contract through proper design,so as to better guarantee the quality.Therefore,when the purchaser selects the procurement mode,it is more advantageous to select the mode of the purchaser,the main contractor and the sub contractor,and it is necessary to reasonably set the terms such as the supervision accuracy rate,the contract penalty and the spot check rate.

Key words: Equipment procurement, Purchase contract, Evolutionary game, Evolutionary equilibrium strategy, Analogue simulation