The utility model relates to an oil field multiple -limb well bores well completion technical field, in particular to instrument is locked to ware to branch's hole deviation. The pole of sending into of this instrument on the inner wall, is sent into the pole lower extreme and is passed through two push rods of torque spring connection on the slant ware through the pin joint that gives up, and two push rods open through torque spring, and slant ware lower extreme is equipped with whipstock positioning tool, and through the pin joint inner tube of locking on the slant ware inner wall, the inner tube passes through the connecting rod and connects slant ware clamping block, and slant ware clamping block is installed in slant ware lateral wall locks the hole. The utility model discloses an unblock is salvaged during slant ware locking when windowing, branch well completion, can make slant organ pipe cluster can not take place the drunkenness when big hole deviation section is used in the great intraductal implementation of cover of hole deviation, and performance safe and reliable makes the slant ware range of application of windowing enlarge. Overcome the current unable locking of slant ware of windowing, taken place the not enough of drunkenness when big hole deviation section is used.