Fastening device of construction formwork for constructional engineering

The utility model relates to a fastening device of a construction template for constructional engineering, which comprises drawing mechanisms arranged on two sides of the construction template, each drawing mechanism comprises a round rod, a sliding groove and a handheld rod, the round rods are connected with the handheld rods and installed in the sliding grooves inwards formed in the two sides of the construction template, and the inner side of one end of each round rod is connected with a pull rope through a round rod connecting block. The other end of the pull rope is connected with an insertion block and stored in an insertion block storage hole inwards formed in the front end of the handheld rod, and at least two clamping holes are formed in one side of the sliding groove and correspondingly connected with the insertion block in an inserted mode; the supporting mechanism at the bottom of the end face of the construction formwork supports the bottom of the placed construction formwork, and the telescopic