Appendix primary-secondary endoscope

The invention discloses an appendix primary-secondary endoscope. The appendix primary-secondary endoscope integrates the functions of examination and treatment, and comprises a primary endoscope and a secondary endoscope, wherein the primary endoscope is a colonoscope used clinically; the secondary endoscope is a flexible endoscope of which the outer diameter is 9-10F and the length is 140-180 centimeters; a primary endoscope instrument pipeline is formed on the primary endoscope; the secondary endoscope is arranged in the primary endoscope instrument pipeline, and can advance and retreat freely in the primary endoscope instrument pipeline; during examination and treatment, the secondary endoscope passes through the primary endoscope instrument pipeline on the primary endoscope after the primary endoscope reaches cecum, and enters an appendix cavity for examination and treatment. Furthermore, the secondary endoscope consists of a secondary endoscope light source, a secondary endoscope electronic camera and a secondary endoscope instrument pipeline, wherein the diameter of the secondary endoscope instrument pipeline is 1.2 millimeters; the secondary endoscope can be used for injecting water for flushing the appendix cavity through a guide wire, performing biopsy on appendical lesions through secondary endoscope biopsy forceps, and extracting appendiceal fecalith through a secondary endoscope stone extraction instrument (such as a stone extraction basket or balloon).