Height-adjustable universal trundle

The utility model belongs to the technical field of casters, and discloses a height-adjustable universal caster which comprises an adjusting part, a supporting leg is installed at the bottom end of the adjusting part through a rotating structure, and a rotatable wheel is installed on the supporting leg. The adjusting piece comprises an adjusting sleeve and an adjusting rod, a threaded groove is formed in the adjusting sleeve in the axial direction, and an external thread is arranged at the upper end of the outer wall of the adjusting rod; height adjustment can be carried out at any time according to different use places and requirements of customers, use is flexible, operation is convenient, when the height is adjusted, only the adjusting rod needs to be held to rotate, the depth of the portion, inserted into the threaded groove, of the adjusting rod is changed, height change is convenient and fast, and after the height is adjusted, the height can be adjusted conveniently. The inner end of the limiting jacksc