The invention provides a refractory iron ore dry grinding-suspension roasting integration technology and device. The refractory iron ore dry grinding-suspension roasting integration technology comprises the following steps of: breaking powder iron ores by a roller press, carrying out ore grinding by a dry-type ball grinder or the roller press, fluidifying to generate fine powder gas-solid two phase flow, then introducing the fine powder gas-solid two phase flow to a raw material cyclone collector for gas-solid separation in a suspension magnetic roasting technology, introducing middle-temperature flue gas discharged by the suspension magnetic roasting technology to a dry-type ore grinding technology for fluidifying, separating to obtain iron ore powder, carrying out oxidizing roasting on iron ore powder in a suspension magnetizing roasting main furnace, preheating coal gas to 450-500 DEG C by using burnt gas discharged by the oxidizing roasting in the suspension magnetizing roasting main furnace, entering a magnetizing roasting furnace so as to carry out iron ore reducing roasting, carrying out indirect heat exchanger cooling on roasted ore produced after reducing coasting to obtain roasting ore with the relatively high magnetism by using a suspended bed supercharger and a fluidized bed. The refractory iron ore dry grinding-suspension roasting integration technology has short technological process, does not consume water, consumes little coal gas, is low in cost, reduces the carbon emission, improves environments and improves economic benefits.