The fire centrifugal fan box is a new generation of energy-saving product for filtration and purification systems and pipeline ventilation. The fire centrifugal fan box is composed of a single suction high-efficiency rear curved inclined centrifugal impeller, a soundproof box, and a low-noise fan dedicated motor. The fire centrifugal fan box has the characteristics of high efficiency, low noise, high static pressure, simple structure, beautiful appearance, and easy installation and maintenance.