The utility model discloses a light emitting diode (LED) module rapid locking mechanism. The LED module rapid locking mechanism comprises a locking piece, a lock cylinder, a rotary knob and an elastic piece, the rotary knob and the elastic piece are located on upper side and lower side of the locking piece respectively, shaft holes are designed in the locking piece and the elastic piece, the lock cylinder longitudinally penetrates the shaft holes of the elastic piece and the locking piece, the top of the lock cylinder is fixedly connected with the rotary knob, a pressing edge which can tightly press the elastic piece is arranged at the bottom of the lock cylinder, wing edges that can extend out of the edges of the locking piece during rotating in the shaft holes with the lock cylinder are formed on the rotary knob, and an end which can rotate the lock cylinder is formed on the outer side of the pressing edge of the lock cylinder. According to the LED module rapid locking mechanism, during usage, the mechanism is fixedly connected with a to-be-connected LED module through the locking piece, the lock cylinder and the rotary knob can coaxially rotate, the lock cylinder or the rotary knob is rotated so that the wing edges of the rotary knob extend out of the edges of the locking piece to be tightly clamped with a support with the mounted LED module, thereby, a rapid locking function is achieved, and the end of the lock cylinder and the rotary knob can coaxially rotate so that double-way assembly and disassembly can be achieved. The LED module rapid locking mechanism has the advantages of simple structure, low-accuracy requirement and easy machining and production. Besides, the labor intensity can be effectively reduced, manpower is lowered, and the production efficiency is increased.