With the section of the Niyang River in Bayi Town of Nyingchi City used as an example, this study was conducted to alleviate the damages of traditional rigid revetments to fragile river ecology and the landscape environment in plateau regions, and to promote the sustainable development of plateau towns. The analysis of river evolution in Bayi Town according to aerophotographic maps of 1970, 1982, 2009, and 2014 shows that the river section has obvious characteristics of riverbed wandering, heart beach development, complicated distributions of islands and branches, and frequent swing of the main stream, leading to significant difficulties in embankment reinforcement. Results also show that the ecological reconstruction of rigid revetments in Bayi Town, Nyingchi City, should be undertaken based on the design concepts of respecting the culture of ethnic minorities, following natural laws, using autochthonous materials, creating waterfront landscape, transforming straight walls to gradual slopes, and protecting biodiversity, and the ecological revetment forms, including plant revetments, pine pile-riprap revetments, stone cage retaining wall revetments, precast concrete block revetments, and ecological concrete revetments should be comprehensively used.