The invention relates to a pressing head for an ultra-low temperature test furnace. A part of the pressing head is placed in the ultra-low temperature test furnace, and a part of the pressing head is placed outside the ultra-low temperature test furnace; the pressing head is convex and comprises a stainless steel layer and a resin glass fiber reinforced plastic layer; the part of the pressing head, which is placed in the ultra-low temperature test furnace, is made of stainless steel and resin glass fiber reinforced plastic in a combined way; the part of the pressing head, which is placed outside the ultra-low temperature test furnace, is made of the resin glass fiber reinforced plastic; and further, the stainless steel layer and the resin glass fiber reinforced plastic layer are bonded by using resin and then are connected by using bolts. The pressing head is arranged at the top end and the bottom end of the ultra-low temperature test furnace in ultra-low temperature stress performance test of concrete, and has the characteristics of good heat insulation effect, low cost, light weight and convenience in operation.