The invention discloses a chlorinated polyethylene (CM)-polyamide (PA) blended elastic material, and a preparation method and application thereof. The method comprises the following steps that (1) PA is subjected to open milling until the PA is plastified into a transparent shape; (2) CM, polyethylene glycol, a stabilizer, an acid-acceptor, a reinforcing agent and a plasticizing agent are added into the PA for mixing, then, cooling is performed, and sheet discharging is performed to prepare rubber sheets; (3) a vulcanizing agent and the rubber sheets are mixed and cooled to prepare the CM-PA blended elastic material, wherein the CM-PA blended elastic material is prepared from the following ingredients in parts by weight: 10 to 40 parts of PA, 60 to 90 parts of CM, 0.5 to 2 parts of polyethylene glycol, 4 to 8 parts of stabilizers, 6 to 20 parts of acid-acceptors, 10 to 40 parts of reinforcing agents, 30 to 50 parts of plasticizing agents and 2 to 5 parts of vulcanizing agents. The CM-PA blended elastic material prepared by the method has excellent non-fusibility, heat resistance and mechanical performance.