This article summarizes LI Shimao’s academic view of "tracing the origin and differentiating the pulse and syndrome"in six aspects. 1) Emphasizing pulse in diagnosis: he put forward the new theories of pulse diagnosis such as "differentiating syndrome by pulse diagnosis"outline theory

"deficiency and excess pulse diagnosis"outline theory and "interpreting pulse mechanism with Qi and blood"outline theory. 2) Emphasizing sweat promotion method in the "three methods"（ including sweat promotion

emetic method and purgative method） : he promoted sweat with acrid-warm drugs not only in the treatment of excess cold syndrome

but also in the treatment of deficiency cold syndrome. 3) Emphasizing Yang deficiency in cold damage syndrome: he regarded Yang deficiency as an important reason for the attack of externally-contracted wind-cold. 4) Emphasizing fire constraint in warm disease: he was the first to pinpointed that the nature of warm disease is stagnated heat

he was good at treating warm disease with clearing

venting and enriching methods of which venting is the core and he invented Xinjia Shengjiang San（ 新加升降散） to treat stagnated heat; 5) Emphasizing treating phlegm and stasis in the complicated diseases: he thought the difficult and complicated diseases in modern medicine were similar to the phlegm syndrome and stasis syndrome in Chinese medicine

so he liked modifying Daotan Tang（ 导痰汤）

ZHANG Zhongjing’s formulae

WANG Qingren’ s formulae for removing blood stasis and Taohong Siwu Tang（ 桃红四物汤） to treat phlegm and stasis syndromes; 6) Emphasizing emergencies in rescue period: he thought Chinese medicine did a great work in treating emergencies

and modern scientific and technological methods should be used in studying emergencies in Chinese medicine.