A damp-proof terminal box comprises a box body and a top cover arranged at the top of the box body. The damp-proof terminal box is characterized in that the top cover comprises an outer cover body and an inner cover body arranged in the outer cover body; a condensation cavity is formed between the outer cover body and the inner cover body; a dehumidification hole communicated with the interior of the box body and the condensation cavity is formed in the inner cover body; an exhaust blower is arranged on the dehumidification hole; condensation screens are arranged in the condensation cavity; breathing holes communicated with the exterior and the condensation cavity are formed in the bottom of the outer cover body; and the exhaust blower lead moisture in the box body into the condensation cavity, the moisture condensed into water droplets after encountering the condensation screens, and the water droplets are discharged to the exterior of box body through the breathing holes. Owing to the arrangement of the condensation cavity, the leak tightness of the box body can be ensured, the moisture is effectively prevented from entering the box body through a dehumidification channel, moisture supplement is cut off from the source, and the damp-proof effect of the damp-proof terminal box is effectively improved.