The invention relates to the field of automobile accessory manufacturing, and relates to a headrest on a seat of an automobile, in particular to an automatic lubricating device for a headrest pin. The automatic lubricating device for the headrest pin comprises a lubricating oil tank, a nozzle, an oil pump and a control device. The nozzle, the oil pump and the lubricating oil tank are communicated with one another in sequence. The control device can control the oil pump to spray lubricating oil in the lubricating oil tank to the headrest pin. According to the automatic lubricating device for the headrest pin, the lubricating oil is sprayed to the headrest pin through the oil pump and the nozzle, the different spraying amounts of the lubricating oil can be controlled according to the different headrest types, and therefore the lubricating oil can be sprayed to the headrest pin evenly and moderately, the phenomenon that the lubricating oil is insufficient or too much is avoided, and it is guaranteed that the seat is not contaminated when the headrest pin is installed. Meanwhile, the amount of the lubricating oil in the lubricating oil tank can be monitored in real time, when the lubricating oil in the lubricating oil tank is insufficient, an operator can be reminded to add lubricating oil, and continuity of production is guaranteed.