Collected 6,349 soil samples (2011-2021) from seven counties or cities in Honghe Hani and Yi Autonomous Prefecture (Honghe Prefecture), we developed a three-stage methodology: (1) indicator optimization using Total Dataset (TDS) and Minimum Data Set (MDS) approaches; (2) weight assignment via Entropy Weight (EW) and correlation coefficients (CC); (3) quality assessment employing Soil Basic Niche-Fitness (SBNF) and Soil Fertility Index (SFI).