The invention belongs to the technical field of high-speed magnetic suspension bearing clamping, and particularly relates to a touch type rapid mechanical tight clamping device. The device comprises adisc-shaped bottom frame, eight cylindrical gears and eight rack clamping claws, wherein a mounting hole, eight clamping and fixing parts, eight cylindrical bosses, eight groups of fixing parts are arranged on the bottom frame, wherein the cylindrical gears are installed on the cylindrical bosses, the rack clamping claws are installed on the fixing parts, and one ends of the rack clamping claws abut against the clamping and fixing parts used in cooperation with the rack clamping claws; and the other ends of the rack clamping claws extend to the edge of the mounting hole all the way, and the rack clamping claws are further meshed with the cylindrical gears on the two sides of the rack clamping claws. The touch type rapid mechanical tight clamping device is a pure mechanical structure, thestrength is high, and cost is low; and when a high-speed rotary bearing is separated from a station, the maximum offset of the rotary bearing is taken as a single vector to design the size of a rack clamping claw triangular boss, the bearing separated from the station once touches the inclined surface of a locking block, the rack clamping claws can quickly move to break through the limiting positions of springs, and then the rack clamping claws are tightly locked again by the locking block; and the device is rapid in response in the whole tight locking process.