The distribution of six species are reported as new records of Orchidaceae in Tibet, including Dendrobium porphyrochilum Lindl., Panisea yunnanensis S. C. Chen et Z. H. Tsi, Pinalia obvia (W. W. Smith) S. C. Chen & J. J. Wood, Thrixspermum saruwatarii (Hayata) Schltr., Bulbophyllum apodum J. D. Hooker and B. striatum (Griff.) Rchb. f.. The morphological descriptions and pictures of these species are provided. Voucher specimens are deposited in the Herbarium of Research Institute of Xizang Plateau Ecology(XZE).