High and low temperature circulating device convenient for temperature control

The utility model discloses a high and low temperature circulation device convenient for temperature control, and belongs to the field of liquid circulation temperature control equipment. The upper surface of the interior of the box body is fixedly provided with a refrigerating box and a heating box respectively; the upper surface of the refrigerating box is fixedly provided with a circulating liquid box; one surface of the interior of the refrigerating box is fixedly provided with a refrigerating device; one side surface of the interior of the refrigerating box is fixedly provided with a heat conducting plate; a heat dissipation channel is fixedly connected to one side face of the refrigerating device, a plurality of electrical bars are fixedly installed on the upper surface in the heating box, and a liquid injection opening is fixedly connected to the upper surface of the circulating liquid box. Through the arrangement of the heat conducting plate, the cooling fins and the cooling channel, heat can be dissi