Protective cap at front end of digestive endoscope

The front-end protective cap comprises a cylindrical cap body, the top end of the cap body is detachably provided with an upper end cap capable of closing an opening of the cap body, and the middle of the upper end cap is provided with a first insertion hole allowing the front end of the digestive endoscope to penetrate through; a lower end cap is arranged at the bottom end of the cap body, a second insertion hole which is communicated with an inner cavity of the lower end cap and can allow the front end of the digestive endoscope to penetrate through is formed in the middle of the bottom end of the cap body, and the second insertion hole corresponds to the first insertion hole in position; an annular guide plate is connected to a port, facing the inner side of the cap body, of the second insertion hole, a corrugated fixing pipe is arranged in the cap body, one end of the corrugated fixing pipe is connected with the end face of the outer edge of the guide plate, and the other end of the corrugated fixing pipe