The utility model discloses a slidingtype is to taut solid roof beam formwork support bracket, including studdle, adjusting nut and joist, be equipped with two relative right angle anchor clamps abovethe joist, adjusting nut and studdle spiro union, the studdle vertical fixation is below the joist, still including being used for fixing the fixed subassembly on the joist with the right angle anchor clamps to and be used for the split bolt that draws two right angle anchor clamps mutually over to one's side, fixed subassembly includes fixing bolt and fixation nut, is equipped with from bottom to top above the joist and narrows the draw -in groove, and the fixing bolt lower extreme is equipped with can be held by gliding card in the draw -in groove admittedly, and fixation nut is with the fixing bolt spiro union and above lieing in the right angle anchor clamps, has good economic and social benefit, and is suitable for being generalized to use.