The invention discloses a clamp groove type scaffold, and a manufacturing and installing method thereof. The clamp groove type scaffold comprises a plurality of vertical rods and transverse rods, wherein the vertical rods and the transverse rods are mutually and vertically connected; the vertical rods are in mutually parallel arrangement; the transverse rods are in mutually parallel arrangement; a square hole is formed in a position, connected with each transverse rod, of each vertical rod; a hollow L-shaped steel block is put in each square hole; the long edge of a solid L-shaped steel block is put in the long end of the hollow L-shaped steel block; a fixed support frame is formed and is used for connecting the transverse rods; and the end part of each transverse rod is provided with a notch; and the notch is clamped in the hollow L-shaped steel block or the fixed end of the solid L-shaped steel block. The clamp groove type scaffold provided by the invention has the advantages that the stress position is in the middle position of each vertical rod; the defect of service life reduction due to eccentric connection of rod elements in node parts is overcome; during the installation, the use of an additional tool is not needed; the installation is convenient; the field construction efficiency is improved; during the manufacturing, holes can be dug in the vertical rods according to different step pitch requirements; and the design flexibility is high.