Six inbred lines in glutinous corn were used as test materials and a complete diallele cross was carried out by the the Griffing method (4) in order to study the general combining ability(GCA), specific combining ability(SCA) of plant height, ear height, the first stalk diameter on ground, the first stalk length on ground, growth date, ear weight, ear length and ear diameter in fresh glutinous corn. The results showed that the difference among GCA of other traits was very significant except the first stalk length on ground and that in SCA of the other traits was also very significant except ear diameter and first stalk length on ground. Ear diameter was mainly controlled by additive gene while the other traits gave expression to both additive gene and non-additive gene actions. In agricultural traits, P2,P6,P3 and P5 inbred lines were comparatively high in GCA of most traits, while the combination of P36,P15,P12,P16,P23 and P26 was the same in SCA.