The invention discloses an adjustable door spindle which comprises a door spindle seat plate arranged on a door frame or a wall. The adjustable door spindle is characterized in that the door spindle seat plate is provided with a pin shaft, and a door spindle panel connected with a door leaf is hinged to the pin shaft and is turned over along the pin shaft; the adjustable door spindle is furthermore provided with a three-dimensional adjustment mechanism, and the three dimensional adjustment mechanism comprises an up-down adjustment mechanism, a left-right adjustment mechanism and a front-rear adjustment mechanism which are adjusted independently. The adjustable door spindle is compact in structure, flexible in adjustment, high in precision and capable of being adjusted independently in the three-dimensional direction, errors existing in the machining and installation processes are eliminated, the gap between the door leaf and the door frame in the door-closed state is eliminated, good sealing performance is guaranteed, the heat preservation performance and water prevention performance of a door are improved, and grain storage quality is guaranteed.