Abstract: Combining fuzzy systems with neural networks, the method of fuzzy risk assessment based on BPneural network is given in the paper.And the model of fuzzy risk assessment based on BP neural networkabout the urban buried gas pipeline is found.Moreover serious degree of the pipeline failure consequenceusing the new method is evaluated.Resultsshow that the difference calculated by the two differentmethods is very small, and miseellaneous processes of defining the weight on various effecting factors andlevel operation are left out.Assessment efficiency of the new method used is improved.