Triacontanol (TA), a long chain fatty alcohol composed of 30 carbon atoms, generally exists in animal and vegetable waxes. Ordinary beewax is used as raw material for the preparation of TA. Big progress has been made in the study of TA formula. The study and preparation of TA emulsive-powder employing β- CD enclosing and linking technique is the pioneer work at home and abroad. This powdery product has some advantages that the emulsion one does not have such as stable yield increase effect, non-deterioration in long period of storage and convenience in storage and transport. Study on the application of TA emulsive-powder the application to seaweed has been carried out. TA emulsive-powder is a kind of plant growth regulator of non-toxic, non contanmination, low cost, and high effect and with wide prospect of application.