Breathable insole

The utility model discloses a breathable insole which is divided into three layers and sequentially comprises an outsole, a breathable waterproof layer and a plant fiber layer from bottom to top. The breathable waterproof layer and the plant fiber layer are embedded in the upper portion of the outsole, the outsole is provided with breathing channels, and the breathing channels are communicated with openings on two side walls of the insole. The breathable insole has the advantages of simple structure, good breathable performance, excellent sweat absorption effect and the like. Besides, the inside of a shoe made from the insole cannot be wet easily and can keep dry, bacterial growth is suppressed, and a healthcare effect for preventing beriberi can be effectively realized.