The utility model provides a scaffold floor entrance to a cave template supporting construction exempts from includes with the corresponding ceiling hold in the reservation entrance to a cave above the floor layer, be connected with the bottom bracket who is located floor layer below through the screw rod with lock nut on the ceiling hold, be equipped with and reserve the corresponding backing board in the entrance to a cave between bottom bracket and the floor layer. The utility model discloses simple structure, easy and simple to handle, during the installation, direct with the backing board hug closely on floor layer bottom surface can, need not be to backing board alignment separately, the efficiency of construction is high, the installation accuracy is controlled easily, is convenient for adjust, to the no requirement (NR) of on -the -spot template installer identification of skill, can improve work efficiency and construction quality greatly, reduces the work degree of difficulty of form setting simultaneously, avoids the intensity of labour who leads to because of doing over again, rectifying and improving too big, is favorable to template installation jobs.