Method for manufacturing optical filtering element

The invention relates to a method for manufacturing an optical filtering element. A glass material, a red light absorbing material and an infrared light reflecting layer material are prepared. The glass material is divided into a plurality of glass substrates. The red light absorbing material is prepared through mixing a medium and an organic pigment. The infrared light reflecting layer material is formed through stacking two or a plurality of materials with different refractive indexes. The red light absorbing material is coated on the glass substrate and is heated to 300 DEG C for forming at least one red light absorbing layer. A plurality of infrared light reflecting layers are formed through arranging the infrared light reflecting layer material on the glass substrates, thereby forming an optical filtering element. Furthermore the method for manufacturing the optical filtering element has advantages of improving transmittance of the optical filtering element, realizing higher color accuracy and reducing haloes.