The invention discloses a treatment method of a roller neck surface. The method includes the specific steps that the center portion of a roller neck is heated at the temperature ranging from 600 DEG C to 700 DEG C, after the center portion is heated, the temperature is kept for 2 to 3 hours, and the outer edge portion of the roller neck is treated through a surface treating agent; and the outer edge portion of the roller neck is treated in the process that firstly, the outer edge of the roller neck is evenly coated with the surface treating agent, the roller neck and a roller body are assembled and placed in a vibrator to be fixed and then shake for 3 minutes to 5 minutes at 700 r/m, and finally the end, close to the roller neck, of the surface of the roller body is heated at the temperature ranging from 550 DEG C to 650 DEG C, wherein the surface treating agent comprises 5 g/L to 30 g/L of polyethylene glycol, 1 g/L to 5 g/L of titanium sulfate, 2 g/L to 8 g/L of phosphoric acid, 1 g/L to 20 g/L of sodium metavanadate, 2 g/L to 8 g/L of tartaric acid, 4 g/L to 11 g/L of malic acid, 4 g/L to 15 g/L of ammonium fluoride, 1 g/L to 6 g/L tungstic acid and 7 g/L to 13 g/L of lactic acid zirconium. By the adoption of the method, a roller is resistant to abrasion and corrosion and is provided with the surface with the good tensile property, it is guaranteed that the connection performance of the roller neck and the roller body is stable, shake is reduced, the noise is low in the rolling process, the rolled product quality is guaranteed, and the safety of the production process is guaranteed as well.