The invention relates to a low-voltage switch cabinet provided with a novel hinge mechanism. The low-voltage switch cabinet provided with the novel hinge mechanism comprises a cabinet body, a cabinetdoor and an electrical component; the electrical component is arranged in the cabinet body; one side of the cabinet door is hinged onto the cabinet body through a hinge; the other side of the cabinetdoor is connected with the cabinet body through a lock; a vertical column is arranged on the side wall of the side, near the lock and at the front part of the cabinet body; a horizontal beam is arranged at the upper edge of the front part of the cabinet body; a supporting part is installed at the upper end of the column; the whole body of the supporting part is shaped as a plate; an arc-shaped bump is manufactured at the upper end of the front end of the supporting part; the bump extends to the outer side of the cabinet body; furthermore, the upper surface of the bump is higher than the lowerbottom surface of the beam of the cabinet body; and when the cabinet door is closed, the upper edge of the cabinet door is appressed to the arc of the bump. The low-voltage switch cabinet provided with the novel hinge mechanism in the invention is smart in design, simple in structure and high in practicability; by the adoption of the low-voltage switch cabinet in the invention, the fact that the cabinet door is tightly closed can be ensured; equipment security operation is ensured; an electrical security accident is avoided; and security of personal and equipment is ensured.