The invention relates to a channel anti-frostbite swelling combination type integrated seepage-proofing and thermal insulation board. The seepage-proofing and thermal insulation board comprises a plurality of combination board bodies which are freely connected in a combined mode, wherein each combination board comprises a middle flat board structure and a peripheral connection interlocking structure, and each middle flat board structure comprises two seepage-proofing layers and a thermal insulation board body arranged between the two corresponding seepage-proofing layers; each peripheral connection interlocking structure comprises transverse beams and vertical beams, the transverse beams are arranged on the two opposite sides of the corresponding flat board structure and are of corner structures, the vertical beams are arranged on the other opposite sides of the corresponding flat board structure, the inner side of one corner structure of one combination board body makes contact with one vertical beam of one adjacent combination board body in an abutting mode, and the outer side of the corner structure of the combination board body makes contact with the outer side of one corner structure of another adjacent combination board body. The seepage-proofing and thermal insulation board has the advantages that the seepage-proofing function and thermal insulation function are integrated, and the combination technique is adopted for integrating the seepage-proofing function and thermal insulation function; the combination structure can guarantee connection stability among panels, and seepage-proofing reliability of joints of the panels can be guaranteed easily.