The invention provides a turning tool device for turning a narrow and deep end face groove with a shaft. The turning tool device is provided with a cutter rod and a cutter blade, wherein the cutter rod is rectangular on the whole, the rear end of the cutter rod and a cutter frame are assembled to form a whole in a clamped mode, the front end of the cutter rod is provided with a groove, the cutter blade is of a concave annular shape on the whole, the cutter blade is held in the groove, the two ends of the cutter blade both extend out of the groove, the upper end face of the cutter rod is provided with a pressing plate, the pressing plate presses the cutter blade into the groove through a sunk screw, the side face of the cutter rod is further provided with a threaded hole I, a screw rod is screwed into the threaded hole I and is locked through a nut, and the end face of the nut abuts against the rear end portion of the cutter blade. The turning tool device is a combination piece on the whole, each single piece is a machined piece, the cutter rod and the cutter blade do need to be welded, when the cutter blade is severely abraded or broken, what is needed is to grind a front corner and a rear corner from the broken portion of the cutter blade, and then the cutter blade can be used; the strength and the rigidity of the cutter rod are good; the abrasion resistance of the cutter blade is good; the extending length of the cutter rod is easy to control; the repeated clamping error is small; the pressing plate and the cutter rod are of an integrated structure, and clamping is easy to achieve; the service life is greatly prolonged, manufacturing is easy to achieve and cost is low.