Abstract: The traditional evaluation model for soil heavy metal pollution consisted diverse indexes and the result exhibited uncertainty. Based on the matter element theory and dependency function in the extension theory， an evaluation model for soil heavy metal pollution was established. In the present study， the established model was used to assess the heavy metal contamination in a sugarcane soil in Guangxi. It was shown that the pollution level of the sugarcane soil was between clean and good， and the evaluation result was comparable to the result made by the Nemerow index method， which proved the feasibility of this established evaluation method.

Key words: heavy metal pollution, Nemerow index method, matter element analysis method