The invention discloses a die used for punch forming of a commingler of a gas turbine combustor and relates to a punch forming die. The die used for punch forming of the commingler of the gas turbine combustor aims to solve the problem that no die is available for machining of the commingler made of high-temperature alloy and composed of a plurality of complicated-structured molding surfaces during punching of the gas turbine combustor at present. The die used for punch forming of the commingler of the gas turbine combustor comprises a lower die unit, an upper die unit and a guiding mechanism, wherein the lower die unit comprises a lower die plate, a male die, a blank holder and a fixing plate, the male die is installed in the middle of the fixing plate, the middle of the blank holder is installed on the male die in a sleeved mode, the upper die unit comprises an upper die plate, a female die, an ejector block, a cushion block and a plurality of compression springs, the upper die plate, the cushion plate and the female die are arranged from top to bottom in sequence and are connected in a detachable mode, the ejector block is arranged in an installation hole and a mold cavity, and the ejector can slide vertically in the installation hole and the mold cavity. The die is used for punch forming of the commingler of the gas turbine combustor.