Using the principal component regression method，the paper makes an empirical study on inf luencing factors of Zhejiang' s transportation services trade. The conclusions indicate that the international competitiveness of Zhejiang' s transportation services trade has improved year by year， but is still very weak ； trade in goods ， coastal port cargo throughput， the output value and employees of transportation industryare main factors inf luencing the international competitiveness of Zhejiang' s transportation services trade. Based on the analyses ， some countermeasures are put forward to promote Zhejiang' s transportations er vices tra de .