The invention discloses an active circulating chemical heat exchanger. The active circulating chemical heat exchanger comprises a main heat exchange drum, a connecting shaft piece and an auxiliary heat radiation box, wherein a long heat radiation column penetrating the interior of the main heat exchange drum is arranged in the middle of a sealed mounting plate; short heat radiation columns are arranged at the periphery of the sealed mounting plate; an air cavity is formed in the upper end of the middle of the main heat exchange drum; a big round disk partition is arranged in the front of a long telescopic rod; an intermediate round disk partition is arranged in the front of an intermediate telescopic rod; a small round disk partition is arranged in the front of a short telescopic rod; a heat radiation communicating sheet is arranged in a heat radiation disk; and a connecting threaded opening matched with the rear part of the connecting shaft piece is formed in the lower part of the auxiliary heat radiation box. The air cavity is formed in the upper end of the middle of the main heat exchange drum; owing to the performance of quick heat radiation of air, the heat radiation efficiency is higher; since the big round disk partition, the intermediate round disk partition and the small round disk partition are respectively arranged in the front of the long telescopic rod, the intermediate telescopic rod and the short telescopic rod, the contact areas between the telescopic rods and a thick to-be-cooled liquid can be increased, and internal cyclic heat radiation is realized; and as a cyclic cellular network is arranged in the middle of the heat radiation communicating sheet, the heat radiation performance is excellent.