The invention discloses an injection mold with deformed mold core. A hydraulic stress plate is connected to the side end of a supporting sliding column, one end of the hydraulic stress plate is connected to a movable mold through a connecting screw rod, a fixed mold is installed at the side end of the supporting sliding column, an inner mold core penetrates through one end of the movable mold, anouter mold core penetrates through one end of the movable mold, a lower rack is welded to one end of the inner mold core, an upper rack is welded to one end of the outer mold core, a connecting gear is arranged between the lower rack and the upper rack in a meshed mode, a heat exchange box is connected to one end of the inner mold core, a push rod is welded to one end of the heat exchange box, theouter side of the push rod is sleeved with a reset spring, the mold core is driven by the rack to move, a size of an inner cavity is changed by changing the inner mold core, when injection molding needs to be conducted on a sleeve part, production can be conducted through a single mold, repeated operation by personnel is not needed, meanwhile, the production time of the sleeve part is shortened,and meanwhile the labor intensity of workers is relieved while the production efficiency is guaranteed.