In this study,two new dendronized nonlinear optical (NLO) polymers were synthesized with high FTC chromophore loading density by introduction of high generation chromophore dendrons on the side chains.Due to their suitable molecular weights,both of them possessed good solubility in common solvents.They also inherited the advantages of dendrimers (large NLO coefficient),especially for PG2 whose NLO coefficient d33 value was as high as 282 pm.V-1.Also,PG2 had a good temporal stability with 80% of its maximum value being retained at the temperature as high as 129 ℃.