The invention relates to a nozzle of a heat storage type combustion device for an industrial heating furnace, in particular to a premixing low-pressure injection heat storage type nozzle, which is characterized in that: a natural gas nozzle (6) is arranged in a pipeline at the inlet of an air passage (8) and is communicated with a natural gas source; an injection nozzle (1) is arranged at the outlet of the air passage (8); a coal gas passage (9) communicated is arranged in a heat storage tank casting body (2) and a wind box (5); an acoustic soot blower (7) is arrange on a pipeline at the inlet of the coal gas passage (9); an anti-fire brick (3) and a heat storage body (4) are arranged in the coal gas passage (9); and the outlet of the coal gas passage (9) is communicated to the side of the injection nozzle (1) to reduce the pressure required by the coal gas for entering the furnace. The nozzle can be applied to various industrial furnaces taking natural gas and producer gas as fuel, and also has more advantages on occasions requiring lower coal gas pressure.