An LED lamp includes a lamp holder; a lamp body; and a retractable rotatable mechanism having a gear seat arranged on the lamp body. A central hole of the gear seat has a gear. Two sides of the central hole are symmetrically provided with deep holes. Each deep hole has a first elastic body. One end of the first elastic body contacts the bottom of the deep hole, the other end of the first elastic body contacts a latch engaged with the gear. One end of a retractable rod is connected to the gear, and the other end of the retractable rod is hinged to a threaded rod. The threaded rod is arranged on a fixing box. A first convex column and a second convex column extend out from two sides of the fixing box. A second elastic body is arranged between the first convex column and the second convex column.