The invention discloses a high-pressure anti-corrosion, anti-crack and anti-drop device. The high-pressure anti-corrosion, anti-crack and anti-drop device comprises two connecting rings, wherein endsof the connecting rings are equipped with a pair of clamping sheets; the clamping sheets are fixedly connected through a plurality of screws; the clamping sheets are movably connected with the connecting rings through a plurality of lock cylinders; the other ends of the connecting rings are equipped with a plurality of splicing strips; and every two splicing strips are connected through a magnet.A main body of the high-pressure anti-corrosion, anti-crack and anti-drop device comprises two connecting rings which are fastened with each other; and the connecting rings are fixedly connected witha tube body of an oil tube through the clamping sheets. In use, the high-pressure anti-corrosion, anti-crack and anti-drop device sleeves the periphery of a connecting device, so that buffer protection can be provided when the connecting device bears external impact; and meanwhile, corrosion, on the connecting device, of outside corrosive substances is also reduced.