Abstract: In the bidding procedure of the construction field, how to determine the bid plays an important part in whether the contractor can win the bidding on reasonable price, and the existence and development of the construction enterprise in the future. In the present research on bidding decision for construction project, the tenderee’s preference for the construction products is usually neglected. So, this paper puts forward that construction product differences should be put into the bidding decision for construction project. Then the Nash equilibrium of bidding decision between two tenderers is studied based on Hotelling model under the condition of construction product heterogeneity. The research results show that the greater the extent of the quality differentiation of the tenderer’s construction products is and the higher the tenderee's preference for the quality of the construction products is, the larger expected equilibrium payoff the tenderer can get.