The utility model provides a coping device of a drill stem thread sealing double-circular-bead face. The coping device of the drill stem thread sealing double-circular-bead face comprises an outer shell sleeve, a left pressing cover, an external thread positioning sleeve, a main shaft, a ball spline sleeve, an antifriction bearing, a connection sleeve, a main circular bead coping block and an auxiliary circular bead coping block. After the external thread positioning sleeve is connected with a to-be-coped thread and positioned, the main shaft of a motor drives circular bead coping block abrasive cloth to cope a circular bead face of the to-be-coped thread. Holes are formed in the outer shell sleeve, so that the connection sleeve can be pulled by a torque rod to enable the positioning sleeve to be screwed into the to-be-coped thread. The positioning sleeve is connected on the ball spline sleeve and can do axial movement on the main shaft, so that the coping blocks are contacted with a to-be-coped circular bead face. The coping device of the drill stem thread sealing double-circular-bead face is simple in structure and easy to produce in mass and popularize. When only the sealing circular bead face of the thread is slightly damaged, the coping device can fast repair the circular bead face, repairing efficiency is improved, workload of lathe turning is reduced, and service life of a thread drill stem is prolonged.