The invention discloses a noninvasive tibia stretching traction apparatus, which comprises a clamping tube, wherein a connecting plate is arranged at one end of the clamping tube; mountain-climbing buckles are arranged at two sides of the connecting plate; a first protective layer and a second protective layer are arranged on the inner wall of the clamping pipe; lantern rings are arranged betweenthe first protective layer and the second protective layer; silicone exhaust tubes are arranged on the first protective layer and the second protective layer; the silicone exhaust tubes are arranged in a mode that one ends of the silicone exhaust tubes run through the clamping tube; the clamping tube is of a hollow structure and is provided with an interlayer; a drying agent is contained in the interlayer; air vents are kept in the inner layer of the clamping tube; a fixing device is arranged at the other end of the clamping tube; a fixing ring is arranged on the inner ring surface of each lantern ring; a protective device is arranged on the inner ring surface of each fixing ring; an electric cylinder is arranged on the clamping tube; the electric cylinder is fixedly connected to the clamping tube; a pedal is arranged at the tail end of the electric cylinder; the pedal is in hinged connection to the electric cylinder; and connecting rings, which are matched with the mountain-climbing buckles, are arranged on the pedal. With the application of the noninvasive tibia stretching traction apparatus, foot drop can be prevented; and by virtue of the air vents and the drying agent which are cooperated in use, sweat in legs of a patient can be absorbed conveniently.