The invention discloses a designed compaction number-of-times determining method of an emulsified asphalt cold recycled mixture. The method comprises the following steps of a first step, molding the emulsified asphalt cold recycled mixture with different factors by means of SGC; a second step, determining a maximal compaction number-of-times Nmax, back-calculating and drawing a compaction curve of the emulsified asphalt cold recycled mixture, and calculating a corresponding compaction parameter according to each compaction curve; a third step, researching sensitivity of each factor to all compaction by means of a single-factor variance analysis method, and evaluating effectiveness of each compaction parameter; and a fourth step, determining a significant influence factor of a designed compaction number-of-times Ndes, finding out main affecting factors by means of a stepwise regression analysis method, and establishing a regression equation of the designed compaction number-of-times Ndes. According to the designed compaction number-of-times determining method, the stepwise regression analysis method is utilized; compaction temperature and emulsified asphalt amount are determined as main factors; and a standard regression equation of the designed compaction number-of-times Ndes of the emulsified asphalt cold recycled mixture is established.