Premature mortality and undernutrition rates in Pakistan are among the highest in the world. Inadequate infant and young child feeding are the major causes of premature mortality and undernutrition. Yet, very little is known about the determinants of complementary feeding practices in Pakistan. Therefore, this study aims to identify the determinants of inadequate complementary feeding practices among children aged 6 to 23 months in Pakistan by using the latest nationally representative data from the Pakistan Demographic and Health Survey (2017-18). The results show that only 12% of children consume a minimum acceptable diet, 21% achieve minimum dietary diversity, and 38% reach minimum meal frequency. Multivariate regression analysis shows that child age, child weight at birth, mother's access to newspapers/magazines at the individual level, wealth at the household level, and prenatal visits at the community level are significant predictors of complementary feeding practices among children aged 6-23 months in Pakistan. These findings show that, in addition to poverty alleviation, raising awareness through health practitioners, increasing access to media, and expanding access to child and maternal healthcare can improve complementary feeding practices in Pakistan. This consequently reduces premature mortality and undernutrition.