The utility model relates to a retrievable reducing whipstock which mainly solves the problem that an existing retrievable whipstock can only carry out single well side tracking due to a low retrieval success rate. The retrievable reducing whipstock is characterized in that the lower portion of an upper connector (1) is connected with an upper cylinder body (5) through a pull rod (3), a piece of oblique iron (4) is arranged on the upper portion of the upper cylinder body (5), a lower cylinder body (13) is connected with the lower portion of the upper cylinder body (5), a piston (18) is arranged between the lower cylinder body (13) and a center pipe (19), tooth blocks (9) are fixed to the outside of the piston (18) through shear pins (17), a ball seat (11) is arranged in the center pipe (19), the upper portion of the ball seat (11) is provided with a steel ball (10) matched with the ball seat through a through hole, the bottom of the lower cylinder body (13) is connected with a primer (16), and a locking ring (15) is fixed to the inside of the primer (16) through a lower shear pin (14). By means of the retrievable reducing whipstock, multiple branches of wells can be dug, and the retrievable reducing whipstock can be repeatedly used.