The utility model discloses an unpowered fiber oiling device, which comprises a support, an oil agent groove fixed at the top end of the support, an oiling oil nozzle assembly and a return oil collecting groove fixed at the bottom end of the support, wherein the oil agent groove is connected with the oiling oil nozzle assembly through an infusion device, a feed pipe is inserted into the oil agent groove, the oiling oil nozzle assembly consists of a plurality of oil nozzles, the lower side of the oiling oil nozzle assembly is equipped with an oil receiving tray, the lower side of the oil receiving tray is connected to the return oil collecting groove through a collecting pipe, the bottom of the return oil collecting groove is provided with an exhaustion valve, the top of the oil agent groove is provided with a vent valve, and the side wall of the return oil collecting groove is provided with an emptying valve. The unpowered fiber oiling device is simple in structure and convenient to use.