A lubricating oil adding device for an oil storage tank of a high-risk pump of an oil refinery comprises a bottom plate. A hand pump set is connected to the upper portion of the bottom plate. Round holes are formed in the four corners of the bottom plate respectively and connected with round sleeves. External threads are arranged at the tops of the round sleeves, and the round sleeves are connected with external discs through the threads. Threaded holes are formed in the external discs and the bottom plate respectively and connected with bolts. The bottoms of the round sleeves are connected with supporting rods, and the supporting rods are connected with external round sleeves. Four insertion openings with the included angle of 90 degrees are formed in the external round sleeves and connected with inverted-U-shaped elastic insertion pieces, the inverted-U-shaped elastic insertion pieces are connected with one-fourth fan-shaped clamping plates, and the four one-fourth fan-shaped clamping plates are clamped to the bottoms of hydraulic lifting rods of spiral hydraulic jacks. Top threaded holes are formed in the tops of the hydraulic lifting rods and connected with threaded rods, the threaded rods are connected with round caps, and the round holes are covered with the round caps.