To analysis composing principles of Professor Ling Chuangquan treating common types of cancer in TCM.Methods:A data base was built based on outpatient medical records of Professor Ling ‘s cancer patients in Shanghai Changhai Hospital.And his experience of composing prescription against tumor was studied based on association rules.Results:Ling's experience of composing prescription against tumor was studied based on association rules are as follow:the core herbs of yin deficiency and blood stasis type are Rehmannia,yam,dogwood,the fruit of chinese wolfberry,peach kernel,red peony,moutan bark and Jiedu formula; the core herbs of dampness and blood stasis type are agastache,amomum,poria peel,alisma,tangerine peel,moutan bark and and Jiedu formula; the core herbs of qi deficiency and blood stasis type are Astragalus,white atractylodes rhizome,Chinese yam,tangerine peel,peach kernel,red peony,moutan bark and Jiedu formula; the core herbs of qi and yin deficiency type are astragalus,white atractylodes rhizome,Chinese yam,coix seed,ophiopogon japonicas,the fruit of Chinese wolfberry,roasted carapax trionycis and Jiedu formula.Conclusion:Professor Ling concentrated on syndrome differentiation,combined particular formula and herbs,analysis the syndrome and the disease at the same time while treating cancer.