The invention discloses a fishing rod type light marking pen. The fishing rod type light marking pen comprises a pen holder (4) and a pen point (5) which are connected. The pen holder (4) is in threaded connection with rod pieces (3), the number of the rod pieces (3) is larger than one, and the rod pieces (3) are in threaded connection. The technical problems that in the prior art, a fixing form is adopted in a project marking pen, lengthening and shortening cannot be achieved, a conventional pen point is adopted as the pen point, obvious and clear marks cannot be drawn, and abrasion resistance and replacing cannot be achieved are solved.