Abstract: In order to reduce the damage of typhoon to urban street trees, the authors investigated the damage cause by typhoon‘Morandi’to street trees of 12 main roads in Xiamen, and analyzed the reasons. The results showed that: 11647 street trees of 22 species in 11 families were surveyed, 6762 (accounting for 58.06%) street trees were damaged. Among the damaged trees, there were 3351 (accounting for 28.77%) lodging and 3411 (accounting for 29.29% ) trees had broken branches and leaves; the amage was serious and caused by objective and subjective reasons. For reducing the damage of typhoon to urban street trees, more attention should be paid to planning, design, construction, management and maintenance, emergency countermeasures and scientific research in the future.