The invention relates to the technical field of big data equipment, and further discloses an auxiliary device for preventing voltage fluctuation from impacting big data operation equipment. The devicecomprises a shell, a push rod is movably connected to the surface of the shell, a clamping block is fixedly connected to the surface of the push rod, a clamping groove is clamped to the surface of the clamping block, a connecting rod is hinged to the end, close to the shell, of the push rod, and a guide rail is slidably connected to the end, away from the push rod, of the connecting rod; and an auxiliary mechanism is movably connected to the side, away from the push rod, of the guide rail and comprises an insertion column. An electromagnetic coil is arranged in the shell, the magnetism is generated while being electrified, when the metal pipe is extruded to move downwards; and the metal pipe is in a threaded shape, the extruded motion can be regarded as the motion of cutting the magneticinduction line, the motion is frequent, and the current generated by cutting the magnetic induction line enters the voltage stabilizer in the cooling box and is stored for later use, so that the effect of preventing the phenomenon that internal parts of the equipment are damaged due to the fact that the equipment cannot be shut down in time due to accidental power failure is achieved.