From the seed oil of Celastrus angulatus, four new beta-dihydroagarofuran sesquiterpene alkaloids were isolated. Their structures have been elucidated, on the basis of UV, IR, mass, 1D NMR and 2D NMR spectra, as 1beta-acetoxy-9beta-benzoyloxy-8alpha-hydroxy-13-nicotinoyloxy-beta-dihydroagarofuran,1beta-acetoxy-9beta-benzoyloxy-8alpha(alpha-methyl-butanoyloxy)-13-nicotinoyloxy-beta-dihydroagarofuran,1beta-acetoxy-9beta-benzoyloxy-8alpha-isobutanoyloxy-13-nicotinoyl-oxy-beta-dihydroagarofuran and 1beta-acetoxy-8beta,9beta-dibenzoyloxy-13-nicotinoyloxy-beta-dihydroagarofuran.