Abstract: Game theory model between construction enterprise and construction worker under uncertain probability is founded to study the construction safety control.The relation between safety behavior and economic parameters is discussed.Analysis on this model shows that the safety behaviors of construction enterprise and workers are affected by many factors,such as the assessment of safety probability,the profits,the cost of security control,the accident loss and compensation,and the strategy of the opponent.Finally,the relations among strategy selection of beth sides,assessment of safety probability and economic parameters are established.