The utility model provides an in put rain -proof heat abstractor of cabinet, including the fixed support frame of putting the cabinet top in that sets up, the cross sectional area from bottom to top convergent of support frame makes the support frame have the plane of slope, surface along the slope on the support frame sets gradually vertical support, and the end fixing of vertical support sets up the drain bar, and the rainwater that drops on drain bar surface can be along the face downward flow, and upper and lower two rows of adjacent drain bars parts are overlapped, and the rainwater that the top flowed down is accepted by the drain bar of below, makes the rainwater trickle layer upon layer downwards. From top to bottom having the space between adjacent two drain bars, making in the support frame air and the external air can the relative flow heat transfer, inside air and the external mutual convection current of air can in time make inside high -temperature gas flow, realize the radiating effect. The support frame has vertical surface in addition, and vertical surface sets up to the plane, makes the support frame form relative confined space, avoids the rainwater edgewise to get into the inside space of support frame.