This paper summarized the clinical experience of Professor GE Linyi in treating ulcerative colitis （UC） by stages with the method of clearing. Professor GE believes that the core pathogenesis of UC is dampness and heat in the intestines， and by taking the method of clearing as the basis， he proposed four methods for treatment of

UC including clearing and transforming， clearing and dispersing，clearing and moisterning， clearing and nourishing. The pathogenesis of UC in its active stage is dampness and heat in the intestines， congestion and stagnation of

qi

and blood， and accumulation of stasis toxins， for which the treatment method is to clear and transform， accompanied by clearing and dispersing method. In terms of the clearing and transforming method，

Bai Tou Weng Decoction

（白头翁汤） combined with Haungqin （

Radix Scutellariae

）， Machixian （

Herba Portulacae

） and Pugongying （

Herba Taraxaci

） is taken as the basic prescription to clear and transform dampness and heat， cool blood， resolve toxins and stop dysentery. For the clearing and dispersing method， medicinals to rectify

qi

such as Chaihu （

Radix Bupleuri

）， Cuxiangfu （

Vingar Rhizoma Cyperi

）， Muxiang （

Radix Aucklandiae

）， Zhiqiao （

Fructus Aurantii

）， and Binlang （

Semen Arecae

）， as well as those to regulate blood such as Danggui （

Radix Angelicae Sinensis

）， Cebaiye （

Cacumen Platycladi

） and Diyutan （

Radix Sanguisorbae Carbonisatus

） are recommended. The pathogenesis of the remission stage is healthy

qi

depletion and lingering pathogen of dampness and heat stasis toxin in the intestines， for which the method of clearing and nourishing， clearing and moistening can be used； the latter is mainly for people with

yin

fluids injury， and self-made

Qingrun Yichang Decoction

（清润益肠汤） is recommended， while the former is for those with spleen and stomach weakness， and self-made

Qingyang Jianpi Decoction

（清养健脾汤） can be used.