High-practicability intelligent fixing device for external connection of computer hard disk

The invention relates to the technical field of computer hardware related equipment, and discloses a high-practicability intelligent fixing device for external connection of a computer hard disk, which comprises a case, a rotating shaft is movably connected to the inner side surface of the case, a gear is fixedly connected to the outside of the rotating shaft, a rack is engaged to the outside of the gear, and a sliding sleeve is fixedly connected to the outside of the rack; and the inner side face of the sliding sleeve is slidably connected with a sliding rod. Through interaction among a rotating shaft, a gear, a magnetic strip, a sliding rod, a sliding sleeve, a linkage rod, a lifting plate, a spring I, a sealing block, a control assembly, a rubber pad and a fixing assembly, the placement condition of the mobile hard disk can be intelligently monitored, and the hard disk is automatically and stably fixed after being placed on the rubber pad; the situation that the mobile hard disk easily falls off from the top of the case and is damaged due to lack of fixation in the external use process is avoided, the safety of the mobile hard disk in the use process is greatly improved, and the actual use requirement can be met.