The invention relates to an omni-directional inerting safety protection device of a sealed coal bunker, belongs to the technical field of safety protection of sealed coal bunkers and aims to solve the problem that the inerting effect of the inside of sealed coal bunkers in the prior art is not ideal. The provided omni-directional inerting safety protection device of the sealed coal bunker comprises a coal bunker body, a lift, pressure relief anti-explosion doors, a material inlet, a temperature sensor, a combustible gas sensor, a smoke sensor, guide ways, a movable gas exchange loop, a fixed gas inflation loop, an inert gas storing tank, valves, a pressure reliever, a clean water storing tank, a pressurization device, a coal bunker outlet gas locking device, a fine water mist dust removal cooling device, gas inflation steel cables and laser distance measuring sensors. According to the omni-directional inerting safety protection device of the sealed coal bunker, the inflation mode of various inert gases is adopted, the fixed gas inflation loop on the wall surface and the gas inflation steel cables are included, and therefore, the problem of non-uniform inerting of the inside of the coal bunker can be effectively solved.