Rapidly replaceable oil box for centralized lubrication system

An oil box capable of being replaced quickly for a centralized lubrication system comprises a quick-assembly box cover, an oil pressing disc, an oil box shell, a blanking cap and an oil bag, one end of the oil box shell is connected with the quick-assembly box cover to form an integrated structure, the oil pressing disc is arranged on the side, away from the quick-assembly box cover, in the oil box shell, the outer edge of the oil pressing disc is matched with the inner diameter of the oil box shell, and the blanking cap is arranged on the outer edge of the oil box shell. The end face, facing an inner cavity of the oil box shell, of the oil pressing disc is connected with one end face of the oil bag to form an integrated structure, the oil bag is packaged in the inner cavity of the oil box shell, a mounting hole of the oil pressing disc and an oil injection hole of the oil bag are aligned and tightly attached, and a blanking cap is further arranged at the mounting hole of the oil pressing disc. A rotary buckl