The invention discloses a breathable insole with composite interlayers. The insole is provided with the air-guiding interlayer and the compressive interlayer in a vertically distributed mode, and the compressive interlayer is provided with a first air exchange port communicated with a space outside a shoe and a second air exchange port communicated with the air-guiding interlayer; when a user walks by wearing the shoe provided with the insole, air ventilation and air exchange are achieved inside and outside the shoe through cooperation of two one-way valves, and therefore air ventilation of the shoe is greatly improved; when a person walks, air in the shoe can be continuously replaced and circulated, and discomfort caused by airtightness of a space in the shoe is avoided; meanwhile, due to the fact that the air-guiding interlayer of the insole is arranged on the upper layer of the whole insole, small breathable holes can be evenly distributed on the surface of the whole insole by reasonably arranging an air-guiding channel, therefore, effective air exchange can be achieved in all parts of the foot sole, the air ventilation and air exchange effects of the insole are significant, and the wearing comfortableness of the user is effectively improved.