Based on mathematical statistics and Q-type cluster analysis, the authors analyzed the heavy mineral ZTR indexes, stability coefficients and assemblage characteristics of the sandstones from Early Cretaceous Chengzihe and Muling formations distributed in 20 drill holes in the main basins of Dasanjiang basin group, and then determined the direction of the provenance. According to the heavy mineral distribution, the study area can be divided into 6 heavy mineral assemblage zones. A comprehensive analysis shows that the provenance directions of Chengzihe and Muling Formations in Dasanjiang basin group did not change significantly, and both of the formations actually had an inheritance relationship.