The invention relates to the technical field of well drilling PDC drill bit orientation, in particular to a well drilling vibration tool and a using method thereof. The upper end of an upper joint ofthe device is connected with a turbine, the lower end of the upper joint is connected with an inner shaft, and the outer wall of the lower end of the inner shaft is in fit connection with the inner wall of the upper end of a telescopic short joint through a spline; the telescopic short joint is internally provided with an adjusting nut which is connected to the lower end of the inner shaft, and the outer side of the inner shaft is sleeved with an outer casing; and a bearing is mounted between the inner shaft and the outer casing, the lower end of the outer casing is connected with an end cap,and the lower end face of the end cap is arranged to be a concave-convex face. According to the well drilling vibration tool, taking the turbine as rotating power is achieved, internal mechanical parts can be driven to produce high-frequency and low-amplitude vibration, the torque when a PDC drill bit cuts stratum can be reduced, so that the effect of stabilizing the tool surface is achieved, thetime for PDC drill bit orientation is greatly reduced, and the mechanical drilling speed is increased.