Abstract: In order to provide the basis for selecting maize varieties with strong germination potential, different original maize germplasm resources were used in this study for discussing the relationship between inbred lines’ grain traits and seed germination ability. Maize inbred lines were used to identify the grain type and 100-kernel weight. Germination potential, germination percentage, root length and bud length were determined by paper germination method. The results showed that the grain size and seed germination had significant correlation. The grain size was significantly correlated to the germination rate and germination potential, respectively. And both of them were negatively low correlation. The correlation coefficient between 100-kernel weight and germination potential was -0.133, while that between the 100-kernel weight and germination rate was -0.132. Moreover, the grain size was significantly correlated to the root length and shoot length, respectively. Both of them were negatively low correlation. The correlation coefficient between 100-kernel weight and root length was -0.222, while that between 100-kernel weight and bud length was -0.215. Grain types had no significant correlation with seed germination, because the correlation coefficients were less than 0.1. The germination rate and germination potential, root length and shoot length had significantly positive correlation, respectively. The correlation coefficients were more than 0.5. Germination potential of inbred lines can be deduced by 100-kernel weight.