A new ent kauranoid named rabdoternin H (1) was isolated from the aerial part of Isodon ternifolius and its structure was determined by the spectroscopic methods.Five known ent kaurane diterpenoids,isodonal (2), longikaurin A, E, G (3-5) and effusanin E (6),together with luteolin (7),apigenin (8),α amyrin (9),ursolic acid (10) and 2α hydroxy ursolic acid (11) were also reported in this paper.