With the rapid growth of the national economy and the increasing speed of modernization construction, the projects are more and more with larger scale. Therefore， it has realistic guiding significance to study project risk management, try to explore solution project risk and find the effective ways to reduce the loss of risk. Construction of project risk assessment index system is the key for risk management, which provides the basis of further plan for project management. According to the characteristics of high slope engineering, risk index system was established.