The common syndromes of pediatric allergic purpura in the early stage are syndrome of wind-heat injuring collaterals and syndrome of bleeding due to blood heat. Its pathological factors are mainly due to heat pathogen, accompanied by the pathogenic wind and blood stasis. Professor Liu’s treatment experience can be summed up as removing heat wind and regulating blood and the treatment for early stage is in clearing away heat and toxic materials, clearing heat and expelling wind-dampness and detoxicating and promoting blood circulation to remove blood stasis, accompanied with in-vitro cultivated calculus bovis, which receives remarkable curative effect based on syndrome differentiation.