The Gyirong Gorge is the largest water vapor passage in the western Himalayas, with good hydrothermal conditions and a diverse topography, which has given rise to impressive plant diversity. This paper reports on two new recorded species of the genus Meconopsis in China, M. autumnalis P. Egan and M. bella Prain, and a species recorded again after publication, M. polygonoides (Prain) Prain, found in Gyirong County, Tibet. The morphological descriptions and notes on their distribution and habitat are provided, and the differences with closely related species are also explained briefly. The discovery has enriched the flora of Tibet and provided new information for the study of the genus Meconopsis in China. Taking into account the historical surveys, the authors of this paper believe that the plant diversity survey in Gyirong County should be adjusted to reduce the overcollection of the traditional Gyirong gorge, i.e. the Gyirong County, along the Gyirong Tsangpo to Gyirong Town, and should be collected in depth towards the Gyirong port and on both sides of the Gyirong gorge.