Supporting device for cement stable layer construction

The utility model discloses a support device for cement stable layer construction, which comprises a lower support plate and an upper support plate, the lower support plate is provided with a connecting assembly, the connecting assembly comprises a guide groove plate arranged on the lower support plate, the guide groove plate is provided with a support rod, and the outer side of the support rod is provided with a fixing assembly. The lower protection plate and the upper protection plate are horizontally moved after being inserted in a staggered mode, so that the limiting clamping blocks and the limiting inclined blocks are connected in a clamped mode, vertical limiting is achieved, then the positioning rings and the positioning rods are in butt joint for positioning, horizontal limiting is achieved, splicing and heightening of the supporting plate are completed, different requirements of actual construction operation can be met, and the construction efficiency is improved. The number of supports for opening t