Abstract: 4 groups of cultionation charaters of plywood in 21 paulownia clones have been studied by means of canonical correlation analysis.The results show that there exist varying correlations between the 4 groups of characters.The correlation of trunk extension character and that of tree crown character are the highest in all character groups. Much difference exists in the characters of growth,stem form.trunk extension and tree crown in the 21 Paulownia clones.