Adjustable and detachable supporting and fastening device for template

The utility model relates to an adjustable and detachable supporting and fastening device for a template, which solves the problems of elevation adjustment, supporting, fastening and disassembly of a cover template. Comprising a connecting bolt and a round support, the connecting bolt is used for adjusting the elevation and supporting a formwork, the upper portion of the connecting bolt is provided with first internal threads, the lower portion of the connecting bolt is provided with second internal threads, and the upper end of the connecting bolt is provided with a groove. The lower end of a supporting screw is welded to a supporting steel bar, and the upper end of the supporting screw is connected with the second internal threads on the lower portion of the connecting bolt. And the fastening screw rod sequentially penetrates through the fastening nut, the 3-shaped fastener, the enclosing purlin, the template and the circular support to be connected with a first internal thread at the upper part of the conn