The utility model relates to a preheating type coal dust burner which belongs to the technical field of coal dust burning. The utility model comprises a burner body, a dense coal dust pipeline, an air pipeline, a thermocouple, a regulator and an executing mechanism, wherein one end of the burner body is connected with a burner chamber; the dense coal dust pipe is connected with the other end of the burner body and is positioned below a horizontal center line of the burner body; the air pipeline is communicated with the other end of the burner body and is positioned above the horizontal center line of the burner body; a regulating valve is arranged on the air pipeline; the thermocouple is arranged on the side wall of the burner body; the regulator is connected with the executing mechanism; the other end of the regulator is connected with the thermocouple, and the other end of the executing mechanism is connected with the regulating valve on the air pipeline. The burner designed by the utility model causes the same burner to burn various kinds of coal, and can operate automatically and decrease the labor intensity. The preheating type coal dust burner has the obvious advantages that the preheating type coal dust burner can automatically adapt to the change of the coal property and the coal specie, and can strength the firing process and the burning process; in addition, the utility model also has the advantages of strong self stability of burning, high burning efficiency and low pollution.