3 stages by different freezing temperatures, as is shown in Fig. 1: The first stage is from the initial temperature of the noodles to the freezing point, in which the curve is steep; in the sec- ond stage, the curve is relatively flat during the maximum ice crystal formation. Due to the formation of ice crystals in noodles, more than 80% of the water is frozen, while the critical heat causes the temperature to drop slowly, and the curve is flat. In the third stage, the residual moisture in the noodles is frozen, and the frozen part continues to cool down to - 18 °C. This figure shows that there is a dif- ference in the maximum ice formation and the freezing time, which may lead to a quality difference in the frozen cooked noodles.