Risk assessment and avoidance model for IT projects in enterprises was constructed along with enterprise competitive strategies.   The index system for IT project risk assessment was established.  These risk factors were categorized, measured and assessed after 128 enterprises information projects and risk current situation were investigated.  The relation between strategy and risk was identified.   The efficiency of enterprise's executing the strategy was analyzed through risk assessment result. A kind of risk avoidance strategies of IT projects in enterprises is put forward and applied. The results show that (1) planning and controlling risk extremely influences all enterprise IT project competitive strategies executions and (2) if different strategies are choose, the risks of IT project development are also different and risk avoidance strategies and decision-making time are distinguished.