The utility model discloses a dismantlement spanner of thread protector, include: the inboard wall of one end and lateral wall mask have soon the adjustable silk braid to opposite screw, the inside wall mask screwed of one end is flexible cover outward, and the one end screw in of adjustable silk braid is outward in the one end of flexible cover and looks threaded connection, flexible cover in the lateral wall mask screwed of one end is in the one end of the adjustable silk braid of one end screw in of interior flexible cover and looks threaded connection, along two connecting rods of the circumference equipartition setting of flexible cover outward, the one end of two connecting rods is the outer flexible other end that overlaps of articulated connection all, with two kellies that set up along the circumference equipartition of interior flexible cover, the one end of two kellies all in articulated the connection other end, the other end of flexible cover correspond articulated the connection on the kelly. The utility model provides a dismantlement spanner of thread protector, instrument and the spanner can not appear dismantling and skid and lead to the fact the thread protector thread alternating and damage the problem of being out of shape before going into the well or dismantlement thread protector that all can be quick before the maintenance of base, and its practicality is better.