Objective To analyze the innovative characteristics of formulas used by Dr.YOU Zaijing

the physician of the warm-reinforcing school in practice

and the relation among him and the other four warm-reinforcing physicians in using medicines.Methods The 187 prescriptions used by Dr.YOU Zaijing

214 prescriptions used by Dr.XUE Lizhai

35 prescriptions used by Dr.ZHANG Jingyue

155 prescriptions used by Dr.LI Zhongzi

and 89 prescriptions used by Dr.SUN Yikui were selected for study.The traditional literature studying method and formula metrological method were used to compare the commonly used medicines and their correlations

four properties

five flavors

qi

blood

yin

and yang

warm-reinforcing

and the medicines used for the spleen and kidney in their practical treatment.Results Of the 8 commonly used medicines

Dr.YOU Zaijing used Renshen（Radix Ginseng）

Danggui（Radix Angelicae Sinensis）

Huangqi（Radix Astragali）

Chaihu（Radix Bupleuri）

and Shengma（Rhizoma Cimicifugae）less in frequency than the four warm-reinforcing physicians.The correlative analysis on the 8 common medicines used by these five physicians showed that the related coefficient R of Dr.YOU Zaijing with Dr.XUE Lizhai

Dr.ZHANG Jingyue

Dr.LI Zhongzi

and Dr.SUN Yikui was-0.082

0.641

0.136

and 0.214 respectively.Dr.YOU Zaijing used the warm-heat

pungent-sweet

and tonics less in frequency than the four warm-reinforcing physicians

but he used the cold-cool far more frequently than them.There was a significant difference between Dr.YOU’s using rate of warm-heat

cold-cool

pungent-sweet

and tonics and XUE’s and LI’s（P<0.01 or P<0.05）

and there was also a significant difference between Dr.YOU’s using medicines for spleen and kidney meridians

tonifying action

and warm-reinforcing function

etc.and the other four warm-reinforcing physicians’.Conclusion Being the successor of warm-reinforcing school

Dr.YOU Zaijing has his own creative characteristics in using medicines

far from the characteristics of the four warm-reinforcing physicians.