The treatment principle of “Severance and Reversion”, first put forward by famous Chinese doctor Mr. Jiang Chunhua, was new to acute febrile therapeutics. Early intervention of the principle, integrated with disease and syndrome differentiation, is advisable on account of such features as abrupt onset, fierce oncoming, speedy progression, fast changes, critical condition and health threatening. Early application of various methods, to list a few, purgative bowel-relaxing, or blood-cooling and stasis-resolving, or heat-clearing and toxin-removing, or health-fortifying and excessiveness-expelling, achieves best curative effect for each course of disease. “Severance and Reversion” played a key role bringing about better clinic effect and upgraded medical service.