The invention belongs to the technical field of aerospace experiments, and particularly relates to a method for reconstructing, displaying and analyzing an engine test data three-dimensional waterfall plot. The method comprises the main steps of: 1, exporting a text-format file from an original three-dimensional waterfall plot of Desktop-Advanced software of LMS Test.Lab Rev; 2, reading amplitude column data in spectrum data from the text-format file; 3, storing the spectrum data as a two-dimensional array; and 4, reconstructing a three-dimensional waterfall plot and carrying out display and analysis, wherein an analysis method comprises analysis steps of extracting data by spectral slices, carrying out dynamic perspective viewing, carrying out data comparison and the like. By the method disclosed by the invention, the defects of display aliasing, fuzzy display effect and poor discrimination of spectrum data of a single-color three-dimensional waterfall plot automatically generated by Desktop-Advanced software of a current LMS Test.Lab Rev are overcome, and the problem of inconvenience for an operator to carry out analysis processing is solved.