The utility model provides a spanner is dismantled to extraction box picture peg relates to shallow formula extraction box auxiliary assembly technical field, is equipped with T type handle on the spanner, and T type handle lower extreme is equipped with the dismantlement head, dismantles overhead being equipped with and dismantles the groove, dismantles the inslot and is equipped with degree of depth mediation bolt, and the degree of depth is equipped with the roof on mediating the bolt, dismantles the overhead illumination torch that is equipped with, and the illumination torch is the slope form and inserts in the dismantlement overheadly. T type handle each other is threaded connection with the dismantlement head. T type handle front end is equipped with with the dolichocephaly. The roof is the electro -magnet. It can fine laminating baffle to dismantle overhead dismantlement groove to made things convenient for and changed and adjust. The position that the roof can be injectd to the bolt is mediated to the degree of depth, so can just can adjust the degree of depth of dismantling the groove according to the water level of incasement to reach optimalizing result of use. The cooperation of T type handle adds the dolichocephaly can reconcile length according to the circumstances to the box that the adaptation degree of depth differed from each other. The illumination torch can illuminate the incasement things to make things convenient for concrete operations.