Measurable barrel opening wrench with window breaking function

The measurable barrel opening wrench with the window breaking function comprises a #-shaped wrench head, a handle is arranged at the top of the #-shaped wrench head, a handle rod is fixedly connected to the top of the handle, a vertical base is connected to the inner wall of the top of the handle rod in a threaded mode, a hollow cylinder is arranged at the top of the vertical base, and the handle rod is fixedly connected with the hollow cylinder. The handle rod is held, the first cylinder is aligned to one corner of a window, the first cylinder and the hammer head are made to move in the direction close to the handle rod by forcibly pressing, when the vertical plate is clamped with the trapezoidal groove, the limiting rod moves towards the side away from the first cylinder and is separated from the clamping groove, and the hammer head pops up under the elastic force effect of the first spring. According to the window breaking device, the glass can be broken without being hit forcefully and slightly pressed, u