The invention relates to body shaping thermal underwear and belongs to the technical field of garments. The underwear is characterized in that: a supporting type belt (6) is arranged between built-in mould cups (2) and an upper abdomen front piece (7) of the top, and the upper abdomen front piece (7) and a back piece (4) are both made of a high-hygroscopicity thermal fiber fabric MOIS CARE; and the pants have a lower abdomen pressure net (14), and the back piece of the pants and the legs (16) of the pants are all made of the high-hygroscopicity thermal fiber fabric MOIS CARE. The underwear has the combined functions of breast lifting type bras, thermal underwear and shaping underwear; the design of the water liner type mould cups and underarm pulling sections pushes the fat to the breast; and the waist and abdomen part and the back part are both made of a knitted fabric blended with high-hygroscopicity thermal fibers, so that not only the lines of the waist and the back are more perfect, but also the problem of traces left on the back by the conventional bra underwear which is worn close to the skin for warming. The underwear is beautiful and practical and can be worn outside. The pressure net on the lower abdomen part makes excessive fat in the abdomen burn quickly with generated heat energy while keeping warm.