The utility model provides a hold in palm on adjustable top of formwork support system is including the pole setting, cup joint the screw rod in the pole setting and connect the tray at the screw rod top, the pole setting passes through with the screw rod that adjustable nut is adjustable to be connected, the upper portion of screw rod be with adjustable nut threaded connection's threaded rod section, lower part be the smooth rod section. The utility model provides a top free end superelevation that exists in traditional formwork support system work progress hold in the palm the technical problem who exposes the screw thread and exceed the standard requirement with adjustable top.