The utility model discloses a diesel engine micro particle catching and regenerating device adopting compound alcohol as auxiliary agents. The diesel engine micro particle catching and regenerating device consists of a compound alcohol storage tank, a compound alcohol pump, a first micro particle catcher auxiliary regeneration module, a second micro particle catcher auxiliary regeneration module, a micro particle catcher, an electric control unit and a tail gas state detection module, wherein the first micro particle catcher auxiliary regeneration module, the second micro particle catcher auxiliary regeneration module and the micro particle catcher are arranged on an exhaust pipe of a diesel engine, the first micro particle catcher auxiliary regeneration module and the second micro particle catcher auxiliary regeneration module are sequentially arranged at the front part of the micro particle catcher, and the first micro particle catcher auxiliary regeneration module consists of a first compound alcohol sprayer and an oxidation catalyst. The diesel engine micro particle catching and regenerating device has the beneficial effects that the diesel consumption during the inner near-back oil spraying of the diesel engine can be compensated, the auxiliary regeneration of the micro particle catcher can be realized, meanwhile, the diesel oil consumption is reduced to a certain degree, and better application prospects are realized.