The invention discloses a distribution network line loss analyzer, comprising an analyzer body, wherein the analyzer body comprises a protective shell, the analyzer is arranged inside the upper end ofthe protective shell, a cavity is arranged inside the lower end of the protective shell, a fan is fixedly connected to the lower end of one side of the cavity, a plurality of heat dissipation holes are formed in the cavity, a battery is fixedly connected inside the protective shell, the battery is electrically connected to the fan, the external side of the protective shell is fixedly connected with an illumination lamp, and the illumination lamp is electrically connected to the battery. According to the distribution network line loss analyzer, the protective shell and a movable plate are arranged outside the analyzer, so that the analyzer can be conveniently protected, a first fixing plate with two clamping blocks is arranged at the lower end of the protective shell, and a first connecting belt with a hook layer and a second connecting belt with a raw wool layer are respectively arranged on the two clamping blocks, so that the analyzer can be conveniently fixed on an arm of a worker and is convenient to carry.