The essence of bank crises is the wrong way of assets allocation,so the optimization of assets allocation is important for the development of bank.In this paper,we using portfolio value maximum of bank's assets as the objective function,using VaR as the constraint,the optimization model of bank assets based on the value maximization of Short Puts Portfolio was set up.The main feature and innovation of this model is to use the value of Short Puts Portfolio to reflect the essential attribute that enterprise value affects loan liquidation.