The invention discloses a styling device for funnel template and steel bars and construction method of styling device. The styling device for the funnel template and the steel bars comprises a screw rod, support steel bars and nuts. The two ends of the screw rod are provided with external threads. The number of the steel bars is two. The nuts include two sets of internal control nuts and external control nuts. The middle of each steel bar is fixedly connected with the screw rob, and the support steel bars are parallel. The support steel bars are located at the inner side of external threads at both ends of the screw rod. The internal control nuts and the external control nuts are arranged on the external threads at the ends of the screw rod. The internal control nuts and the external control nuts are matched with the external threads arranged on both ends of the screw rod, and heel blocks are further arranged at the two ends of the screw rod. A round hole is formed in the middle of each heel block, and each heel block is located between the corresponding internal control nut and each external control nut. Each internal control nut is located in the corresponding heel block, and each external control nut is located outside the corresponding heel block. Materials of the funnel template and funnel reinforcement measures are saved by 30%. Radian molding quality of the funnel template is good. Before the installation of the funnel template, the internal control nuts are added to ensure the installation location of the funnel template and the operating efficiency is improved at the same time.