In order to compare the three typical methods of evaluating the sediment pollution, samples of top sediment were collected from eleven sites of Beidagang Reservoir, and indicators of total salt content, organic matter content and the concentrations of total phosphorus and total nitrogen were monitored. Three typical methods including single factor index evaluation method, Nemerow comprehensive index evaluation method and fuzzy mathematic comprehensive evaluation method were used to evaluate the status of pollution respectively. The results indicated that the S1, S2 and S3 sites located in the center of the reservoir were moderate or severe polluted and the rest of the sites on the edge of the reservoir were non-polluted or lightly polluted. The pollution of sediment in the center was more serious than that on the edge of the reservoir. Taking the Beidagang reservoir as an example, the comparison of the three methods indicates that the single factor index evaluation method was convenient to evaluate but the results are relatively high; the Nemerow comprehensive index evaluation method was a comprehensive method, but it ignored the impacts of the weight of the evaluation indices; the fuzzy mathematic comprehensive evaluation method was an objective and comprehensive method, it calculated the weighting of the index based on the entropy weighting method, and the result was closer to the actual status.