Objective:To explore the core medication law of constipation in the Yi Zong Jin Jian using data mining techniques; To provide idea for the clinical treatment of constipation. Methods:The prescriptions related to constipation in the Yi Zong Jin Jian were summarized, and the frequency statistics, the efficiency statistics of the properties and tastes, correlation analysis and complex network analysis were carried out on the data set using the TCM Inheritance Cloud Platform V1.0, and the visualization was carried out. Results:A total of 106 prescriptions for constipation were included, involving 169 kinds of Chinese materia medica, with a total frequency of 894 times. The high-frequency Chinese materia medica included Rhei Radix et Rhizoma, Glycyrrhizae Radix et Rhizoma, Scutellariae Radix and Angelicae Sinensis Radix, etc. Chinese materia medica was mainly composed of purging drugs, tonifying drugs and clearing heat drugs. The main tastes were pungent, sweet and bitter, while the main properties were cold and warm, and the main meridians were lung, spleen, stomach and liver meridians. 10 drug combinations such as Rhei Radix et Rhizoma-Scutellariae Radix, Rhei Radix et Rhizoma-Natrii Sulfas were obtained by second-order analysis, 9 drug combinations such as Rhei Radix et Rhizoma-Angelicae Sinensis Radix-Glycyrrhizae Radix et Rhizoma, Scutellariae Radix-Coptidis Rhizoma-Rhei Radix et Rhizoma were obtained by third-order analysis, and 12 categories were obtained by community cluster analysis.Conclusions:In the treatment of constipation in the Yi Zong Jin Jian, it follows the academic thought of "warming, clearing and tonifying". It focuses on the method of tonifying and lowering, and takes warming and tonifying deficiency, clearing heat and defecating as the basic treatment, with cold and warm drugs, based on syndrome differentiation and treatment of zang-fu organs. When treating, it is required to prioritize the disease and treat it according to the syndrome.