The invention discloses a water-cooled communication cabinet comprising a cabinet body. An upper top, a lower bottom, a left outer sidewall and a right outer sidewall of the cabinet body are fixedly provided with a cooling layer, and the cooling layer is a water circulation flat pipe which is spirally wound and fixed on the upper top, the lower bottom, the left outer sidewall and the right outer sidewall of the cabinet body. Outer protective plates are fixed onto the outer sidewall of the cooling layer, and the water inlet end and the water outlet end of the cooling layer extend out of the corresponding outer protective plates. The upper and lower parts of a back board of the cabinet body are provided with circulation holes. The upper and lower parts of the back board of the cabinet body are fixedly equipped with fans. The wind outlet end of the upper fan is communicated with the upper circulation hole of the cabinet body, the wind inlet end of the lower fan is communicated with the lower circulation hole of the cabinet body, and the two circulation holes are communicated via a connecting pipe. A water cooling means is adopted for heat exchange cooling, and the cooling effect is good. Circulating air flow is adopted inside the cabinet, which makes the heat exchange cooling effect better. Moreover, the internal fans are easy to install and dissemble.