Abstract: 【Objective】The combining abilities of agronomic traits in super sweet corn inbred lines was investigated to provide a foundation for the breeding of excellent hybrids.【Method】The combining abilities and population genetic parameters of yield per plant, pericarp thickness, soluble sugar content, plant height, ear height, ear length, ear thickness, kernel number per row, rows per ear, barren ear tip, and 100-seed weight were investigated in 13 sweet maize inbred lines by using the complete diallel cross of Griffing method.【Result】According to the measurement values of yield per plant, pericarp thickness, and soluble sugar content, B6 was identified as high yield-excellent inbred line, B10 and B11 as highyield inbred line, and B13 as excellent inbred line. And 13 inbred lines were divided into multiple heterotic groups based on the combining ability effect values (CAEVs).【Conclusion】According to the scientific evaluation on the CAEVs of agronomic traits in 13 inbred lines, the inheritance law and correlation of different agronomic traits and the division of heterotic groups were explored, which will provide theoretical guidance for hybridization preparation and inbred lines screening by the reasonable utilization of sweet corn inbred lines in the future.