LED decorative lamp base convenient to adjust

The LED decorative lamp base convenient to adjust comprises a supporting base body and a lamp body, an annular base is fixedly installed at the top of the supporting base body, the top of the annular base is fixedly connected with the lamp body through a supporting plate, the outer surface wall of the annular base is connected in a screwed mode, an outer sleeve shell is arranged above the annular base, and the outer sleeve shell is connected with the supporting plate. A linkage assembly used for vertical linkage of the outer sleeve shell and the screw ring is arranged between the outer sleeve shell and the screw ring. In the base, the convex ring at the top of the ring seat is synchronously in sliding fit with the sliding of the upper vertical strip and the mounting plate along the groove, the axial deflection of the outer sleeve shell can be limited while the rotation of the threaded sleeve is not influenced, so that the outer sleeve shell is stably subjected to vertical position adjustment, and meanwhile, t