The invention relates to a novel modularized headrest of an automobile seat. The novel modularized headrest is characterized by comprising a platform body used as the base of the modularized headrest, wherein a cavity allowing a safety module system to be mounted, a wing-foundation fitting plane allowing a wing module system to be mounted, a frontward-backward slider channel, a lock-bolt fitting piece, slide rails for button return pieces, spring fixing claws for the button return pieces, upper-section fitting cavities of headrest rods, and a clamping transverse beam of an outer cover shell are arranged on the platform body, wherein the frontward-backward slider channel, the lock-bolt fitting piece, the slide rails and the spring fixing claws are used for allowing a frontward-backward sliding module system to be mounted; the upper-section fitting cavities are used for allowing a rotary regulation module system to be mounted; fixing bolt holes are formed in the lower ends of the upper-section fitting cavities; the clamping transverse beam is used for allowing the outer cover shell to be mounted. According to the novel structural design mode of the headrest provided by the invention, the headrest can be randomly matched with function modules according to demands of clients so as to satisfy the demands of the clients, repeated design is not needed, and each function module can be independently mounted on the platform body, so that the situation that no module is attached to the others in the headrest is guaranteed.