The invention relates to an interframe error code masking method based on fuzzy classification, which belongs to the technical field of video communication based on macroblock coding. The method mainly comprises the following three steps of: 1. establishing a cache region of a decoded frame, carrying out fuzzy characteristic value extraction on the decoded frame and classifying a trained fuzzy classifier; 2. carrying out interframe error code masking on a lost macroblock of the current decoded frame by utilizing all available decoded frames judged by the fuzzy classifier in the cache region of the decoded frame; and 3. fitting data obtained after all available rebuilding frames carry out error code masking on the current error code frame to obtain a final error code masking result.