Abstract: This paper considers a cold standby repairable system consisting of two dissimilar units and two repairmen. In the system, the life distributions of the two units are assumed to be the general distribution, but the repair distribution to be the exponential. By using the non-markov renewal process and the tool of the Laplace transform, we obtain some reliability quantities of the system,such as the distribution of the first failure, the availability and the frequency of failure of the system, etc.