The invention discloses a permanent magnet operating mechanism using a repulsive mechanism and having a short-time closing function and a method. The permanent magnet operating mechanism comprises a repulsive driving mechanism (17), a first non-magnetic-conducting material cushion block (7), a second non-magnetic-conducting material cushion block (11), a magnetic circuit separation permanent magnet operating mechanism (18) and a guide rod (1), wherein the repulsive driving mechanism (17), the first non-magnetic-conducting material cushion block (7), the second non-magnetic-conducting materialcushion block (11) and the magnetic circuit separation permanent magnet operating mechanism (18) are arranged inside a non-magnetic-conducting shell (2), and the guide rod (1) penetrates through the non-magnetic-conducting shell (2) and is slidably connected with the non-magnetic-conducting shell (2). In the permanent magnet operating mechanism, the repulsive driving mechanism (17) is additionallyarranged, and the three command modes of closing, opening and short-time closing are provided. A traditional way is adopted for the opening and closing operation, a new way is adopted for the short-time closing operation, and the repulsive driving mechanism (17) is arranged to assist in the operation, so that the closing holding time is greatly shortened, the initial speed in the opening stage inthe short-time closing operation is increased, the opening acting time of the mechanism is shortened, and the effect of short-time closing is achieved finally.