Abstract: A horseshoe trimming device for securement to a farrier's anvil has a base provided with a downwardly extending rectangular post dimensioned for insertion into a rectangular socket on the farrier's anvil. A clamp screw clamps a portion of the anvil against the rectangular post. An anvil plate is secured to an adjustment plate which is pivotally mounted on an upper surface of the base. Opposed set screws bear against opposite side edges of the adjustment plate for adjusting the attached anvil plate in opposite rotational directions. By tightening a pivotal mounting bolt extending through the adjustment plate, the attached anvil plate may be secured in a selected adjusted position. The anvil plate has an arcuate edge dimensioned for cooperation with the arcuate cutting edge of a shear blade to trim end portions of a horseshoe. The arcuate shear blade has an elongated rectangular shank received within a rectangular guide tube for vertical reciprocal movement.