Abstract: 【Objective】 To explore the fundamental factors related to the quality of processed rice. 【Methods】 A RIL population F₇ with 243 families constructed by 13JZ-44/13JZ-19 was used as the test material, and the phenotypic data of brown rate, milled rice rate and head milled rice rate were collected from 2019 to 2021, and QTL related to processing quality was analyzed. 【Results】 The results showed that 9 QTLs related to processing quality traits were detected, among which 2 QTLs of brown rice percentage were located on chromosome 4 and 11, respectively, with phenotypic contribution rates of 18.68% and 75.32%. The three QTLs of milled rice rate were located on chromosomes 1, 2 and 5, respectively, with the contribution rates of 4.35%, 0.75% and 16.21%. The four QTLs of head rice rate were located on chromosomes 5, 6 and 8, respectively, with the contribution rates of 10.76%, 5.86%, 5.42% and 3.66%. 【Conclusion】 qHR-6-1, qHR-6-2 and qBR-11 are newly discovered Loci for controlling brown rice rate and head rice rate, qHR-6-1 and qHR-6-2 have slight effect on head rice rate. And qBR-11 is a new major QTL for controlling brown rice rate.