This study investigated the mechanism of the emulsifier against fresh wet noodle retrogradation during the shelf life. By using differential scanning calorimetry (DSC), analyzed thermodynamic change of fresh wet noodle which were added two different emulsifiers, stearoyl lactylate (SSL) and β-cyclodextrin (β-CD), deproteinized or degreased. The results showed that the amylopectin retrogradation enthalpy of fresh wet noodle which were added SSL and β-CD were less than that in the CK group (P＜0.05) after stored at 4 ℃ for 14 day; The recrystallization melting temperature T_p and the retrogradation enthalpy △H of the second complex peak in the SSL and β-CD added groups were higher than that CK group (P＜0.05); The amylopectin retrogradation enthalpy of fresh wet noodle which was deproteinized was more than that in the untreated group after stored at 4 ℃ for 14 day, but no significant difference; The recrystallization melting temperature and the retrogradation enthalpy of the second complex peak in the fresh wet noodle which was deproteinized was more than that in the untreated group, but no significant difference in the retrogradation enthalpy; There were no significant difference in the amylopectin thermodynamic feature of fresh wet noodle which was degreased and noodle was untreated after stored at 4 ℃ for 14 day; The recrystallization melting temperature and the retrogradation enthalpy of the second complex peak in the fresh wet noodle which was deproteinized was significantly more than that in the untreated group (P＜0.05); Two emulsifiers interfere the combination of amylose and lipid, they and amylose and lipid form a new complex to against the retrogradation of fresh wet noodle during the shelf life.