Abstract: To study kinetics on the extraction of Panax notoginseng. According to Fick’s first law of diffusion,the kinetic equations for the extraction process of PNS R1,ginsenoside Rg1,ginsenoside Rb1 were established with plate model,and the parameters,such as K(rate constant),Ea(activation energy),y (yield) were gained.The results showed that the extraction’s speed and concentration increased with the increasing of temperature,and with lower temperature,the concentration of balance time for each component became shorter.The kinetic models were accorded with characteristics of the first kinetic equation and can describe the extraction process of three ingredients of Panax notoginseng and provide the valuable theory basis for technical design.

Key words: Panax notoginseng, extraction, kinetic model, kinetic parameter