Two new cave-adapted pseudoscorpion species belonging to the family Chthoniidae are described: Tyrannochthonius pandus sp. nov. from Biyu Cave (Yunnan: Luxi) and Lagynochthonius laoxueyanensis sp. nov. from Laoxueyan Cave (Yunnan: Yanshan). Both of them, collected from the dark zone of caves, are highly troglomorphic species.