This paper summarized professor YANG Chunbo′s experience in treating chronic constipation. It is believed that the treatment of chronic constipation should be in accordance with the three categories of causes. Environment

season

constitution

diet and emotions are all the important causes

bringing the dysfunction of zang-fu（脏腑） organs including spleen

stomach

lung

liver and kidney

as well as the replenishment and depletion

the unblocking and blockage of qi

blood and fluids

which are the key processes of formulation and development of chronic constipation. In clinical practice

he advocates the theory of "spleen and stomach damp-heat"

lays emphasis on the examinations of tongue and pulse

and is good at implementing treatment based on the principles of "deficiency and excess

cold and heat

constitution and zang-fu organs".