Traditional morphological data and truss network data were combined to conduct a multivariate analysis to study the morphological variations and phylogenesis of four strains in red common carp （ Cyprinus carpio ） ： C. c. vat. color, C. c. vat. singguonensis, C. c. vat. wananensis and C. c. vat. wuyuanensis. The results indicate that： （ 1 ） In the aspect of meristic characters, there were no significant differences（ P 〉 0.05） among the four strains; （2） In the aspect of traditional measurable characters plus truss network characters, there were significant differences（ P 〈 0.05 ） among the four strains. Cluster analysis showed that C. c. var. wuyuanenis was separated from the other three strains which are close to one another; discriminate functional analysis based on 28 ratio variables showed that there were highly significant differences among the four strains（ P 〈 0.01 ）; discriminate functional analysis with 8 selected morphological ratio variables gave a synthetic discriminating accuracy of 92% ; principal component analysis indicated that morphological differences among the four strains were mostly due to variations in the frontal part of the body. （3） Using various multivariate analysis techniques to analyze the combination of traditional morphological data and truss network data greatly enhances the study capacity for morphological variations and phylogenesis among populations or strains under a species of fish.