In order to analyze the changes in main quality indicators during the ripening process of netted melon and conduct a comprehensive evaluation,this article took the fruits of two varieties,'Bilong'and'Ruilong',from Tianjin as experimental materials at 15,30,45,50,55,60 d after flowering.By measuring the appearance traits and quality traits of fruits at different growth stages,comprehensive evaluation of fruit quality used principal component analysis provides a theoretical basis for the harvesting of greenhouse netted melon in Tianjin.After factor analysis,'Bilong'extracted two main factors,with a cumulative variance contribution rate of 91.257%.The comprehensive score model of factor analysis showed that'Bilong'ranks first in fruit score on 50 d after flowering,the second was on 45 d after flowering,and the third was on 55 d after flowering.Based on the analysis of taste and nutritional ranking,the best tasting period for'Bilong'was between 45-55 d after flowering.'Ruilong'extracted two main factors,with a cumulative variance contribution rate of 89.957%.The factor analysis comprehensive score model showed that'Ruilong'ranks first in fruit score on 55 d after flowering,and the second was on 60 d after flowering.Based on the analysis of quality and appearance ranking,the best tasting period for'Ruilong'was between 55-60 d after flowering.