The invention provides a device for removing oil dirt from a water discharge pipeline of a kitchen. The device comprises a water discharge pipe connected with a water discharge port of a water discharge groove, a water conveying pipe connected with the lower end of the water discharge pipe and a control system; the water discharge pipe comprises a double-layer casing pipe and a connecting pipe; the upper end of the double-layer casing pipe is connected with the water discharge port; a gap between the inner layer and the outer layer of the double-layer casing pipe forms a water discharge channel; a sealing cover is arranged at the upper end of an inner layer pipe of the double-layer casing pipe; a cleaning assembly connected with the control system is arranged in the inner layer pipe; the two ends of the connecting pipe are connected with an outer layer pipe and the water conveying pipe; and an electric trace heating cable connected with the control system is arranged in the water conveying pipe. Heating of the electric trace heating cable enables the oil dirt which is solidified and attached into the water conveying pipe to be dissolved at high temperature, the adhesive force is reduced, the cleaning assembly cleans the oil dirt, the oil dirt is separated from the water conveying pipe, and the oil dirt is washed down with water; and finally, the oil dirt of the water dischargepipeline of the kitchen is cleaned, blockage of the water discharge pipeline caused by solidification of the oil dirt of the kitchen is avoided, and pollution to the ground of the kitchen caused by the traditional mechanical cleaning is avoided.