The invention discloses a quick-mounted honing fixture. The quick-mounted honing fixture comprises a fixture body; a bracket is arranged at the bottom of the fixture body; the fixture body is provided with a horizontal step hole; a plunger sleeve to be machined is inserted in the step hole; a boss is arranged at the top of the fixture body, and is provided with a horizontal guide hole; a movable screw is inserted in the guide hole; the left and right ends of the screw respectively extend out of the guide hole; a return spring sleeves the left end of the screw; two ends of the return spring respectively butt against a screw head of the screw and the left side surface of the boss; the right end of the screw is connected with the upper end of a connecting plate which is arranged on the right side of the boss; a horizontal insertion hole is formed in the fixture body; a movable dowel pin is inserted in the insertion hole; the left end of the dowel pin extends out of the insertion hole to insert in an oil hole of the plunger sleeve so as to position the plunger sleeve in the step hole; and the right end of the dowel pin extends out of the insertion hole to connect with the lower end of the connecting plate. The dowel pin can be quickly inserted in and pulled out through pressing the screw head of the screw, so that the plunger sleeve mounting and dismounting efficiency is prominently improved.