The Lower Cretaceous flora of the Jiuquan Basin, Gansu of Northwest China, is divided into two assemblages. Assemblage Athrotaxites-Solenites from the upper part of the Chijinpu Formation consists of Solenites luanpingensis Wang, Pityocladus cf. iwaianus (ishi) Chow, Pityocladus sp. and Athrotaxites berryi Bell, which is considered as early Early Cretaceous in age and it reflects humid or semi-humid climate. Assemblage Brachyphyllum-Pseudofrenelopsis from the upper part of the Zhonggou Formation represented by Sphenopteris sp., Pseudofrenelopsis dalatzensis (Chow et Tsao) Cao ex Zhou, Cupressinocladus elegans (Chow) Chow, Cupressinocladus sp., Pagiophyllum yumenense sp. nov., Pagiophyllum compressum sp. nov., Pagiophyllum sp., Brachyphyllum ningshiaense Chow et Tsao, Brachyphyllum obtusum Chow et Tsao, Elatocladus sp., Podozamites sp. and Carpolithus sp. shows Aptian Albian of Early Cretaceous and indicates arid climate.