The invention relates to a comprehensive evaluation method of underground water, wherein the method includes steps of a, re-classifying the classification dividing value of seventeen
water quality indexes such as
manganese,
fluoride, monoiodide and mercury in the underground
water quality; b, selecting the
water quality index participated in rating according to the testing index of the underground
water sample, and substituting the testing result of the underground
water sample and the classification dividing value of the selected water quality index participated in the evaluation to a
membership function, and calculating and acquiring a fuzzy membership matrix; c, performing
data conversion on a toxic index of the water quality index; d, according to the converted toxic index, the sample testing result, and the classification dividing value of the water quality index, calculating a weight matrix; e,
coupling the fuzzy membership matrix with the weight matrix, and acquiring the
evaluation result matrix and the evaluation grade of the underground water quality. The
evaluation result fully considers about the risk of the
human body health, and can comprehensively evaluate the underground water quality from the view of the
human body health risk; the
evaluation result can further objectively reflect the drinking safety.