The present invention discloses a multifunctional distribution cabinet with a dampproof device. The cabinet comprises a cabinet body, the outer wall of the cabinet body is provided with a shielding layer, a pedestal is horizontally arranged at the lower side of the cabinet body, the bottom of the cabinet body is fixed at the surface of the pedestal through two support pillars, the upper side of the cabinet body is provided with a top plate, the top plate is fixed at the upper surface of the cabinet body through the support pillars, scrolls are arranged around the lower side of the top plate, a fixed rod is arranged at the corresponding position of the upper side of the pedestal and the scrolls, a rain-proof and sunscreen cover is winded on the scrolls, a cabinet door is arranged at the front side of the cabinet body, and the left end of the cabinet door is connected with the cabinet body through a hinge. The multifunctional distribution cabinet with the dampproof device has good anti-interference performance, the rain-proof and sunscreen cover improves the rain-proof and sunscreen capacity of the cabinet body, the service life of the cabinet body is prolonged, the arrangement of an observation window facilities observing the internal work condition of the cabinet body, the observation window can be protected, the practicability is high, and the multifunctional distribution cabinet with the dampproof device can effectively perform fire protection so as to improve the safety and facilitate the night emergency maintenance.