This paper summarized Professor PENG Peichu's experience in the differentiation and treatment of prostate cancer in three phases and four stages. It is considered that prostatic cancer is categorized into root deficiency and branch excess， with depletion of healthy

qi

as the root， and the accumulation of cancer toxin as the minifestation. Clinical diagnosis and treatment of prostatic cancer can be divided into three phases and four stages according to the exuberance and decline of pathogenic and healthy

qi

and the changes of deficiency and excess of

yin

and

yang

. In the initial accumulation phase of cancer toxin （

yang

excess stage）， the key pathogenesis is the accumulation of dampness， heat and static blood， and internal generation of cancer toxin， and the treatment should be resolving toxins， fighting cancer and dispelling

yang

excess. In the phase of healthy

qi

deficiency and toxin accumulation （

yin

deficiency stage）， with the lung and kidney

yin

deficiency， dampness， heat and static toxin accumulation as the key pathogenesis， the treatment should be centered on mutual generation between metal and water to nourish kidney

yin

， supplemented with the method of clearing heat and draining dampness， activating blood and resolving toxins， for which self-made

Nanbei Formula

（南北方）is usually used. In the phase of

yang

deficiency and cold stagnation （

yang

deficiency stage and

yin

excess stage）， with the spleen and kidney

yang

deficiency， cold dampness stagnation， static heat and toxin accumulation as the key pathogenesis， the treatment should be warming and tonifying spleen and kidney to dissipate cold accumulation； for deficiency of both

yin

and

yang

， and excess pathogen obstruction， modified

Yanghe Decoction

（阳和汤） is recommended， while for

yang

deficiency， cold congealing and blood stasis， self-made

Wenshen Sanjie Formula

（温肾散结方） can be used， and for cold dampness binding with cancer toxin， and cold complex with heat， self-made

Quanan Formula

（泉安方） is advised.