The invention relates to a bus trace extraction method based on fuzzy denoising and fuzzy splicing. The method comprises the following steps of obtaining four kinds of information including bus routes, station arriving bus license plate numbers, station arriving stations and station arriving time; performing numeralization on the four kinds of information in a database; generating an information matrix G; generating a two-dimensional information matrix G<(m, l)> which uses the license plate number index value m and the route index value l as the division basis and is subjected to dimension reduction to only remain the station arriving time T and the station arriving station index I through the information matrix G; obtaining a fuzzy operation matrix G according to the historical data statistic experience of the running time between bus stations; extracting a trace segment set G<(m, l)> from the information matrix G<(m, l)> through the fuzzy operation matrix C; for the trace segment set G<(m, l)>, splicing trace segments belonging to the same shift into the same trace according to the station arriving sequence through a fuzzy splicing algorithm; removing the trace noise after the splicing by using a fuzzy denoising algorithm; and outputting a noiseless shift trace information matrix S<(m, l)>. The bus trace extraction correctness is improved through denoising.