Accurate positioning tool capable of being lengthened for lamp hole

The utility model discloses an extendable precise positioning tool for a lamp hole, relates to the technical field of positioning tools, and aims to improve the positioning accuracy and efficiency of the lamp hole, the extendable precise positioning tool comprises a main ground inserting rod and an extension rod, one side of the main ground inserting rod is fixedly provided with a fixed rod, the inside of the extension rod is movably connected with a rotating shaft, and the rotating shaft is movably connected with the main ground inserting rod. A limiting groove is formed in the middle of the limiting rod, the upper surface of the movable rod is fixedly connected with a protruding block, the protruding block is movably connected into the limiting groove, and the outer wall of the protruding block is in threaded connection with a fixing bolt. When the lamp holes need to be positioned, the main ground inserting rod is inserted into the center point where the lamp holes are distributed, the positions of a row of