The utility model discloses an instrument of shifting up is prevented in jarring, include: the barrel, jar stem, its one end have a boss, the one end setting that the jar stem has the boss is in in the barrel, the other end stretches out barrel one end, the jar stem can be followed the barrel inner wall slides, press the cap, it sets up the barrel both ends to prevent jar stem from the interior roll -off of barrel, two are supported the claw, and it sets up through the pin is fixed on the barrel, be provided with the spring between two support claws, lower connector, its one end have a toper cap, the one end setting that lower connector has the toper cap is in in the barrel, the other end of connector stretches out down the barrel other end, and can follow down connector extending direction slides, this device with the bumper jar with prevent shifting up the instrument perfect adaptation, form an instrument, have the function of preventing shifting up with the jarring concurrently, gained good effect in the in -service use, greatly reduced the risk of division sliding sleeve operation.