[Purpose/significance] This paper discusses the complementary problem between implicit indexes in science and technology evaluation. The complementary problem is that an index which does not increase or increases rarely can be compensated by other index increasing more, and the complementation is divided into equal complementation, excess complementation and under balance complementation. [Method/process] It designed a method of test and judgment, aiming at a certain nonlinear evaluation method, and maintaining an index constant, to calculate the change of evaluation value which is caused by increasing other different attribute index average, and compared with the change of linear weighted method evaluation value.[Result/conclusion] Research shows that the complementation between the index of multi-attribute evaluation method is a complex problem, which is influenced by various factors such as evaluation method, index data, weight arrangement and compensation value; the method of multi-attribute evaluation based on ratio is more likely to be the under balance complementation; due to the correlation between similar evaluation indexes, the indexes of complementary should be carried out between different attribute indexes; the complementation problem of indexes has a profound influence on the selection of multi-attribute evaluation methods, and in essence the index weight is changed euphemistically, which can be used as a method of evaluation test and management control.