The effect of the factors, such as the temperature of diazotizing reaction, the PH value of the reaction medium during the reduction of diazonium salt to p-sulfonamido phenylhydrazines and the amount of sodium suifite, on the reaction and production is discussed. 其中对重氮化反应的温度,及由重氮盐还原成对一磺酰胺基苯肼时还原介质的PH值和亚硫酸钠用量等对反应及产率的影响。