The utility model discloses a deep hole kerve device, including body (1), copper feather key (2), broach (4), adjusting nut (5), lock nut (6), penetration of a cutting tool pole (7) and pull rod, body (1) rear end is connected with rod thread, many flat coppers of equipartition feather key (2) on the circumference of body (1), the penetration of a cutting tool pole passes through lock nut (6) to be fixed in the hole of body (1) front end, gos forward or retreats through adjusting nut (5) control penetration of a cutting tool pole, the rear end of penetration of a cutting tool pole (7) is equipped with the wedge dovetail, and the broach passes the locating hole of body (1) perpendicularly and is connected with the wedge dovetail cooperation of penetration of a cutting tool pole. The utility model discloses saving the cost, improving production efficiency greatly, technological time of preparation is short, economic cost low, and processing product quality is high, break through the traditional handicraft restriction in hole kerve processing field, had very high value.