The invention discloses a method for inverting a logging pore structure of sand and mudstone, and the method is characterized by comprising the following steps of determining a rock physical model ofthe sand and mudstone; classifying the pores according to the characteristics of the pore structure of the sand and mudstone, and determining the pore structure of the sand and mudstone in combinationwith the logging data. The method provided by the invention can fully combine the actual geological characteristics of the sand and mudstone to fully consider mutual influence among respective poresby using the Mori-Tanaka equivalent medium model suitable for the lithology of the sand and mudstone, can invert the pore structure of the sand and mudstone simply and effectively with high precisionof results, and can carry out shear wave forecast, which meets the requirements of conventional logging data analysis, improves the application range, and provides help for physical analysis of logging rock.