Correlation analysis of 16 agronomic traits was made with 127 popcorn inbreds. Resuits showed that number of ears/plant, seed weight/ear, degree of ear baldness and ear length of those traits, play the most important role in grain yield formation, Less baldness of ears, more ears/plant, high grain, weight/plant and long ear should be desired for yield breeding in the biotype of Jilin province. Moreover, popseed percentage and times of expansion are not significantly correlated with grain yield. Breeding for high grain yield does not necessarily lead to decrease of seed quality, and selection for high-yielding and early maturity at the same time is possible.