Abstract: The structure and functions of SRTP(Software Reliability Testing Platform) consisting of main control computer and stimulation computer are introduced. On the basis of expansibility and universality,the study is concentrated on scheduling strategy and key implementation technology in simulation computer,such as real-time network communication,hardware driving method in Windows 98.In this paper,the new technique of graph task chain for task scheduling is proposed and how it can be applied to engineering is discussed.The practical results show that the technology is reliable,expansive and applied.