The invention discloses a positioning embedded component for a lamp pole of a large square lamp. The positioning embedded component comprises a round bottom plate and a peripheral protection sleeve which is arranged on a periphery of the bottom plate; a wiring positioning hole with the diameter of 4.5 mm and 8 anchor bolt holes are formed in the bottom plate; the wiring positioning hole is formedin a central part of the bottom plate; upper parts of bolt screw rods penetrate through the anchor bolt holes, and adjustable nuts are used for fastening and positioning; lower parts of the bolt screwrods are fixed through fixing slabs; the bottom plate is manufactured by cutting a Q235B steel plate; the dimeter of the bottom plate is 850 mm, and the thickness of the bottom plate is 14 mm; the peripheral protection sleeve is manufactured by adopting a 6mm steel plate; the height of the peripheral protection sleeve is 150 mm; and the peripheral protection sleeve is connected with the bottom plate through welding. The positioning embedded component has the advantages of being convenient in operation, precise in positioning and height marking and easy to detach; a mould plate can be recycledfor use for multiple times; a supporting effect is good; and problems that profile steel needs to be machined secondarily on site and a profile steel beam cannot be assembled can be effectively avoided.