The invention discloses a method for converting production of sodium caseinate. The method comprises the following steps: 1, determining a raw material characteristic, wherein Qula casein is used as a raw material; 2, puffing and converting, wherein the Qula casein is added into an extruder at a constant speed, 8-12 percent by weight of powdery sodium carbonate or 2-6 percent by weight of sodium hydroxide solution of the Qula casein are added when the Qula casein is added, the flow of the introduced sodium hydroxide solution is 100-200 L/h, the Qula casein and powdery sodium carbonate or the sodium hydroxide solution are converted in the extruder with a temperature of 110-130 DEG C for 20-25 seconds; and 3, crushing, wherein puffed and converted sodium caseinate is placed on a conveyor belt to be naturally cooled and dried and then enters a crusher so as to obtain a sodium caseinate powdery product. The sodium caseinate sample produced by the method has a good protein characteristic and is good in viscosity, sodium caseinate has a good color and a normal flavor, and a low albuminous degeneration degree is achieved because materials almost do not generate a browning reaction, and thus a high product quality standard is met.