On the basis of general methods for evaluating lake cutrophicalion, the anthor summarized some comprehensive assessment methods for lake eutrophication reported at home and abroad. It is pointed out that the trophic state index should be the major method for evaluating lake eutrophication status, since it could provide a continuous numerical class of lake trophic state and a rigorous foundation of quantitative studies of eutrophication mechanism. After analyzing some determination methods of weight distribution in lhe comprehensive indices, ihe anthor insists that the hierarchical analysis bo quite perfect to determine weights. This paper shows the weight distribution of TSI and its modifiers. Additionally, il is discussed in brief the relations between comprehensive evaluation and other statistical methcxls such as cluster analysis in the last part of this paper.