The invention discloses a heatless arrayed waveguide grating capable of realizing sectional temperature compensation. The grating comprises an arrayed waveguide grating chip and a metal baseplate, the arrayed waveguide grating chip is fixed on the metal baseplate, an elastic piece is arranged at an area, corresponding to a parting line of a first part and a second part of the arrayed waveguide grating chip, on the metal baseplate, a second elastic piece formed by a non-through slit is horizontally arranged below an area, where the second part of the arrayed waveguide grating chip is fixed, of the metal baseplate, the metal baseplate is divided into a first metal baseplate part, a second metal baseplate part and a third metal baseplate part by the first elastic piece and the second elastic piece, the first elastic piece enables the first metal baseplate part and the second metal baseplate part under the condition of stress to relatively move, and the second elastic piece enables the second metal baseplate part and the third metal baseplate part under the condition of stress to relatively move. The heatless arrayed waveguide grating capable of realizing sectional temperature compensation improves stability of central wavelength of an arrayed waveguide grating spectrum and expands working temperature range of the arrayed waveguide grating spectrum.