The invention discloses a power distribution cabinet with good waterproofness. The power distribution cabinet with good waterproofness comprises a cabinet body, and the front portion of the cabinet is provided with cabinet doors; a plurality of transverse baffle plates which are parallel to the bottom face of the cabinet body are arranged in the cabinet body, and a cavity are formed between two transverse baffles; two longitudinal baffle plates are arranged in the cabinet body, and the longitudinal baffle plates are perpendicular to the bottom face of the cabinet body, an air flue is formed between the two longitudinal baffle plates, and the longitudinal baffle plates are communicated with the cavities; the back portion of the cabinet body is provided with an air inlet of a draught fan, the draught fan is arranged in the cabinet body, and air outside of the cabinet body is suctioned in the air flue by the draught fan. The power distribution cabinet with good waterproofness further comprises a circular rain canopy and a barrel-shaped waterproof device; the cabinet body is arranged in the middle of the barrel-shaped waterproof device, and the circular rain canopy is arranged on the top of the cabinet body. According to the power distribution cabinet with good waterproofness, when stormy weather comes and impounded surface water is much, the water can not flow into the power distribution cabinet through gaps of the cabinet doors of the power distribution cabinet or ventilation and heat dissipation holes.