[Objective] The study aimed to put forward optimization plan for the main influencing factors in the processing production of preserved Szechuan pickle.[Method] The quadric regression rotation combination with 5 factors was used to study the influences of the 5 main factors(application rates of N and P,salt concentration,salted temperature and time) on the nitrite content in the processing production of preserved Szechuan pickle.[Result] The regression analysis showed that except for P application rate,the ...