The invention discloses an outdoor electric cabinet based on an optimized wiring technology. The outdoor electric cabinet comprises a fixed base and a first PCB (printed circuit board), wherein a mounting groove is formed in the middle of the fixed base; a cooling base is arranged at the upper part of the fixed base; a damping plate is arranged in the middle of the cooling base; a mounting electric cabinet is arranged at the upper part of a base groove; a PCB fixing plate is arranged on the inner side of the front part of the mounting electric cabinet; a second PCB is arranged at the rear partof the first PCB. A counterweight plate is arranged at the bottom of the mounting groove, the outdoor electric cabinet is placed more stably outdoors, the cooling base is arranged at the upper part of the fixed base, internal cooling treatment can be performed at the bottom of the mounting electric cabinet, a plurality of circuit guide blocks are arranged in the middle of the rear side of the first PCB, internal wiring of the mounting electric cabinet can be reduced by wrapping connection of internal lines, maintenance is convenient, a plurality of mounting contacts are arranged at the two ends of a printed backbone circuit respectively, and therefore, potential safety hazard caused by aging after long-term use is avoided.