Abstract： This paper introduces Professor CHEN Yuelai's clinical experience in treating refractory constipation in elderly patients with acupuncture based on the method of treating the blocked by blocking. Professor CHEN Yuelai believes that the refractory constipation in the elderly patients is often caused by kidney yang deficiency-cold and kidney yin insufficiency， with the core pathogenesis being deficiency in origin and excess in superficiality. CHEN attaches great importance of treating from the kidney based on syndrome differentiation， and supplementing and boosting kidney yin and yang； he also focuses on adopting the method of treating the blocked by blocking，giving priority to warming and unblocking on the basis of purgation. In clinical practice， CHEN combines the theories of channels and collaterals as well as zang-fu organs，pays attention to syndrome differentiation，and adopts acupuncture to achieve "the arrival of qi at the location of disease". Besides，it is supplemented with life adjustment guidance to achieve the purpose of regulating the balance of yin and yang of zang-fu organs and improving intestinal function.