Anal canal cancer belongs to malignant tumor disease, and there is no so-called latent period for malignant tumor disease, so there is no so-called how long is the latent period for anal canal cancer. Anal canal cancer is a kind of malignant tumor disease of gastrointestinal tract, which indicates that the primary tumor lesion originates from anal canal. For the malignant tumor disease of anal canal cancer, there is no so-called latent period, and the latent period mainly occurs in the course of various infectious diseases. In the early stage of the disease, the volume of tumor lesion is relatively small, so there is no obvious symptom, but this stage can only be called the early stage of the disease, which cannot be called the latent period. With the development of the disease, anal canal cancer in the progressive stage will cause symptoms such as change of stool habit, change of fecal character, anal pain, anal itching, mass in anal canal, swelling of inguinal lymph nodes and so on. Individuals who have suspected the above symptoms should seek medical treatment in time, improve the examination and make a clear diagnosis. Early discovery and early treatment should be carried out under the guidance of professional physicians to avoid delaying the condition and bringing adverse consequences.