Method for separating terpinene from cinnamomum longepaniculatum oil

The invention discloses a separation method of terpinene in cinnamomum longepaniculatum oil, the separation method is used for secondary utilization of leftovers after separation of cineole from cinnamomum longepaniculatum, the cinnamomum longepaniculatum oil is subjected to reduced pressure rectification, the reduced pressure rectification is used for releasing components, and passivated cineole liquid and leftovers are obtained; the passivated cineole liquid is crystallized in a melt crystallization mode, passivated cineole and leftovers are obtained, the leftovers are put into a rectifying tower to be rectified, the leftovers in the rectifying tower are subjected to crude separation through corrugated packing, and terpinene with the purity of 80% is obtained after crude separation through the rectifying tower. Purifying the terpinene with the purity of 80% by molecular distillation to obtain the terpinene with the purity of 98%; the invention aims to solve the problems that the added value of by-products i