The utility model discloses an all-round-light high-convection LED bulb which comprises an outer cover, LED luminous bodies, a full-angle LED luminous body fixing plate, a radiator, a multitooth plastic piece, a lamp cap and a circuit board. The radiator corresponds to a hole of the full-angle LED luminous body fixing plate. The multitooth plastic piece and the radiator are fixedly locked through a screw. The circuit board is arranged at the inner end of the radiator of the bulb. The LED luminous bodies are arranged in screw holes in five faces of the full-angle LED luminous body fixing plate. The outer cover is arranged in a groove of the full-angle LED luminous body fixing plate. According to the all-round-light high-convection LED bulb, the radiating effect is good, the luminous efficiency is high, full-angle lighting ranges are achieved, lighting areas are significantly increased, the structure is simple, production cost is low, and the LED bulb is suitable for being produced, popularized and used.