The invention relates to the technical field of fiber production, in particular to a drawing oil bath constant temperature system. The system comprises a front coiling machine, a rear coiling machine,an oil bath pond and an oil bath pond seal cover; the oil bath pond is arranged between the front coiling machine and the rear coiling machine and internally provided with a steam pipeline used for heating, an electric control valve is arranged at an air inlet end of the steam pipeline, an infrared temperature measurement device is arranged on the oil bath pond seal cover, and the steam pipelineand the electric control valve are electrically connected with a control device. The drawing oil bath constant temperature system is simple in structure, easy to implement and capable of heating the oil bath pond by means of steam in a factory directly, waste of the steam is reduced, the oil temperature in the oil bath pond is automatically controlled, the physical-mechanical properties of fiber are guaranteed, the work efficiency and product quality are improved, and the cost is greatly lowered.