Abstract: 1. After the alkaloids had been removed from the toluene extract of Ma Huang with oxalic acid solution, the toluene was distilled off and the residue steam distilled, a fragrant volatile oil was obtained with the following constants: n_D²⁰ 1.4940, α_D²⁰-31.44°, d₂₀²⁰ 0.8819. 2. When the volatile oil was subjected to fractional distillation and chromatography, a terpene alcohol was obtained, its formula corresponding to C₁₀H₁₈O. It was identified to be l-α-terpineol through its urethane derivative and nitrosyl chloride adduct. Its infra red absorption spectrum and retention time in gas chromatography were identical with a known sample.