An LED display, comprising a casing frame and an LED module, wherein the LED display further comprises a locking knob fixed on a rear side of the LED module, and wherein the locking knob comprises: a mounting plate, provided with an extension portion extending upwardly perpendicular to the mounting plate; a lock cylinder, fixed to the LED module by the mounting plate and sequentially extending through the extension portion and the mounting plate; a handle, fixed at an end of the lock cylinder away from the mounting plate; and a spring wire core, having an end fixed in a portion of the lock cylinder close to the handle and another end wound around an end of the lock cylinder close to the mounting plate, and configured in a spiral shape; and wherein the locking knob is arranged to form a releasable connection between the LED module and the casing frame, and wherein the LED display further comprises a support base comprising a base body and a support plate, the support plate connected with a middle portion of the base body, the base body comprising a recess for receiving the support plate, the support plate being rotatable within the recess and having a groove provided with a movable second connection member therein, second positioning holes provided at a bottom of the casing frame, second positioning posts provided at the base body and fitted with the second positioning holes, and a movable first connection member provided at the rear side of the casing frame, the movable first connection member detachably connected with the movable second connection member. the locking knob comprises: a mounting plate, provided with an extension portion extending upwardly perpendicular to the mounting plate; a lock cylinder, fixed to the LED module by the mounting plate and sequentially extending through the extension portion and the mounting plate; a handle, fixed at an end of the lock cylinder away from the mounting plate; and a spring wire core, having an end fixed in a portion of the lock cylinder close to the handle and another end wound around an end of the lock cylinder close to the mounting plate, and configured in a spiral shape; and wherein a mounting plate, provided with an extension portion extending upwardly perpendicular to the mounting plate; a lock cylinder, fixed to the LED module by the mounting plate and sequentially extending through the extension portion and the mounting plate; a handle, fixed at an end of the lock cylinder away from the mounting plate; and a spring wire core, having an end fixed in a portion of the lock cylinder close to the handle and another end wound around an end of the lock cylinder close to the mounting plate, and configured in a spiral shape; and wherein the locking knob is arranged to form a releasable connection between the LED module and the casing frame, and wherein the LED display further comprises a support base comprising a base body and a support plate, the support plate connected with a middle portion of the base body, the base body comprising a recess for receiving the support plate, the support plate being rotatable within the recess and having a groove provided with a movable second connection member therein, second positioning holes provided at a bottom of the casing frame, second positioning posts provided at the base body and fitted with the second positioning holes, and a movable first connection member provided at the rear side of the casing frame, the movable first connection member detachably connected with the movable second connection member. a support base comprising a base body and a support plate, the support plate connected with a middle portion of the base body, the base body comprising a recess for receiving the support plate, the support plate being rotatable within the recess and having a groove provided with a movable second connection member therein, second positioning holes provided at a bottom of the casing frame, second positioning posts provided at the base body and fitted with the second positioning holes, and a movable first connection member provided at the rear side of the casing frame, the movable first connection member detachably connected with the movable second connection member.