This article tries to discuss the pathogenesis of colorectal cancer from the aspects of viscera correlation and meridian correlation. It is considered that colorectal cancer can not only influence the spleen and stomach of middle Jiao, but also cause the tumor to metastasize to the liver through the influence of Qi stagnation and blood stasis, and can be transferred to the liver by the relationship between meridians and collaterals.We advocate "the place where evil is not preempted" based on the thought of "treating disease and preventing disease" in TCM, and it is advocated to use Chinese Med...