The invention discloses a thermal suit and a production technology thereof and belongs to the technical field of suit processing. The thermal suit comprises a surface layer, a middle layer and an inner layer; the surface layer comprises, 10-20% of polyester fiber, 45-55% of wool and 30-40% of cotton fiber; the middle layer comprises 5-10% of polyvinyl chloride fiber, 10-20% of acrylic fiber, 35-45% of cotton fiber and 35-40% of wool; the inner layer comprises 10-20% of copper ammonia fiber, 15-25% of vinylon fiber, 30-40% of modal and 30-40% of cotton fiber. The modal is Lenzing modal; the cotton fiber in the surface layer is mercerized cotton; the cotton fiber in the middle layer and the inner layer is long stapled cotton; the wool in the middle layer is Meng wool; the wool in the inner layer is Australia wool. The polyester fiber is added to the surface layer, PTEE coating is compounded on the surface layer by adopting a lamination technique, and the anti-wind capacity of the thermalsuit is improved; the polyvinyl chloride fiber and the acrylic fiber are added to the middle layer, so that the thermal and venting capacity of the thermal suit is improved; the copper ammonia fiber,the vinylon fiber and the modal fiber are added to the inner layer, so that the moisture adsorption capacity of the thermal suit is improved.