This study examines 136 stilt houses of ethnic minorities in the Duliu River Basin, focusing on floor-plan types, distribution, and features. Based on three residential forms and five hall types, seven types are identified. Analysis shows that the “Kanlan/Kōchō” type dominates the upper basin, while the “Kanlan/Kanrō” type prevails in the middle and lower basin. The “Chikyo/Chūdō” type is concentrated on the northern middle basin, and hybrid types are also confirmed. Their chronological characteristics are examined, and ritual culture is analyzed to clarify the ethnic attributes of floor plans.
