So this paper first creatively combines the consumer sensitivity with brand emotion to construct the new market segmentation model,of which the consumer sensitivity includes the brand sensitivity and price sensitivity,brand emotion includes the truly emotion and due emotion.

Brand sensitivity and price sensitivity greatly influence the choice of consumers.

First,it introduces the traditional stochastic inventory model with price sensitive demand,and then gives out an ameliorated model and compares the two models.

How to reduce the consumer s price sensitivity is one of the important problems that managers are concerning about.

The basic premise of this conclusion is relative lower search cost of online consumers, which is believed to increase consumers’ price sensitivity.

The price competition in retailed sales of finished oil products industry is much to seen,but study of measurement of price sensitivity is not often noticed.

Therefore,it is very important for manufacturers to find the factors reducing consumers’ online price sensitivity.

On the basis of the model,it analyses the differences of price sensitivity of customers with different loyalty and the reasons for the differences theoretically.