Abstract: In this paper, fuzzy integration method is applied to evaluation of town gas explosion hazards. The effect of the factors with high hazard and low weight is enlarged through integration The potential hazard coefficients and indices are defined. the investigation of a LPG station, the potential hazard coefficients of each facto which compose the element are obtained. As a result the potential coefficient of the whole system by fuzzy integration is obtained. Because the fuzzy integration is defined reasonably the result reflects the situation of the LPG station as a whole. This method can be adapted to other evaluation fields as well.