This application discloses a cache address mapping method and a related device. The method includes: obtaining a binary file, the binary file including a first hot section; obtaining alignment information of a second hot section, the second hot section is a hot section that has been loaded into a cache, and the alignment information includes a set index of a last cache set occupied by the second hot section; and performing an offset operation on the first hot section based on the alignment information. According to embodiments of the present invention, a problem of a conflict miss of a cache in an N-way set associative structure can be resolved without increasing physical hardware overheads, thereby improving a cache hit rate.