Preheating device for die-casting die

The utility model relates to the field of die heating, and discloses a die-casting die preheating device which comprises a T-shaped heating pipe body, and the outer wall of one end of the heating pipe body is fixedly connected and communicated with a gas access pipe. The upper surface and the bottom surface of one end, far away from the gas access pipe, of the heating pipe main body are fixedly connected and communicated with a preheating disc, a plurality of gas outlet holes are formed in one side, far away from the heating pipe main body, of the preheating disc, and one end, far away from the preheating disc, of the heating pipe main body is open and is in threaded connection with a sealing cover; according to the novel die-casting die preheating device, combustion gas is exhausted into the preheating disc from the heating pipe body and then exhausted through the multiple air outlet holes in the preheating disc, the combustion gas is ignited, the overall combustion range is wide, an upper die and a lower di