Oiling device for polyester staple fibers before curling

The utility model relates to a device for oiling polyester staple fibers before curling. The tensioner is arranged in the feeding direction of the oil injection chamber; the oil supply assembly and the air injection assembly are arranged on one side of the oil injection chamber respectively; a plurality of output ends of the oil supply assembly and the air injection assembly are arranged on the inner walls of the two sides of a material channel of the oil injection chamber; the relaxation heat-setting machine is arranged in the discharging direction of the oil injection chamber; the two groups of wire harness guide assemblies are respectively arranged at a feed port and a discharge port of the oil injection chamber; the wire leading speed of the wire harness guiding assembly at the feeding port of the oil injection chamber is higher than that of the wire harness guiding assembly at the discharging port of the oil injection chamber. The multiple output ends of the air injection assembly are all located below t