Phytochemical investigation of the whole herbs of Aconitum tanguticum (Maxim.) Stapf var. trichocarpum Hand.-Mazz. led to the isolation of one heteratisine-hetidine-type bis-diterpenoid alkaloid, trichocarpidine (1), three hetidine-hetisine type bis-diterpenoid alkaloids, trichocarpinine AC (24, resp.), together with nine known compounds. Their structures were elucidated by spectroscopic analyses.