The reuse metrics of the test case is a realistic problem during software reliability test based on reuse, at the present time. Based on the designing of the test case reuse model, we use the feature analysis method to account the weight of reuse resource firstly, secondly we calculate the reuse metrics of the resource in the test case, at last we get the average reuse metrics based on the formula. We solved the problem of reuse metrics from quantitative angle in this paper.