The invention relates to an oiling device, particularly to an oiling device with adjustable oil and capability of oiling different parts of workpieces needing to be oiled, and belongs to the technical field of industrial machinery. The oiling device comprises a cylinder, a mounting plate, a reversing valve, a swing gas claw, oil-way guide blocks, a fixing base, a pneumatic control valve and an oiling pipe, wherein the cylinder, the reversing valve, the swing gas claw, the pneumatic control valve, the oil-way guide blocks and the fixing base are respectively mounted on the mounting plate; a reversing button is arranged on the reversing valve; the claw end of the swing gas claw is provided with a chuck on which the oiling pipe is mounted; the cylinder is provided with an oil cavity and a pneumatic cavity; the oil cavity is communicated with the oil inlets of the oil-way guide blocks; one oil outlet of the oil-way guide blocks is communicated with the oiling pipe, and the other oil outlet of the oil-way guide blocks is communicated with the oil inlet of the fixing base of which the oil outlet corresponds to the internal surface of a workpiece; the reversing valve is communicated with the pneumatic control valve communicated with the pneumatic cavity of the cylinder and the gas inlet of the swing gas claw. The signal is controlled by a PLC.