Esophageal cancer t3n0m0 belongs to TNM staging stage IIB. In TNM staging of esophageal cancer, T represents the depth of primary tumor invasion into the esophageal wall, N represents whether there is regional lymph node metastasis, and M represents whether there is distant metastasis.T staging is further classified into Tis, T1a, T1b, T2, T3, T4a, T4b, N staging is classified into N0, N1, N2, and N3, and M staging is classified into M0 and M1. Esophageal cancer t3n0m0, where t3 indicates that the tumor invades the esophageal periphery, n0 indicates that there is no lymph node metastasis, and m0 indicates that there is no distant metastasis. TNM staging of esophageal cancer is subdivided into four stages: Ⅰ, Ⅱ, Ⅲ and Ⅳ, in which t3n0m0 belongs to stage ⅡB. Regardless of the stage of esophageal cancer, one should go to the hospital in time for consultation, so that professional doctors can make targeted treatment plan according to the severity of the disease.