There are 35 landfalling tropical cyclones in Zhejiang Province from 1949 to 2004. The average moving velocities and acceleration during 24 hours and 6 hours before landing are calculated. The results show that 60% of landfalling tropical cyclones move faster before landing; 28.4% move at the same speed, and 11.4% move more slowly. Analyzed are the atmospheric circulation, the steering flow, the structure and intensity changes of tropical cyclones before landing, so to find the reason why tropical cyclones move at different velocities before landing. It is found that the moving velocity of a tropical cyclone is closely correlated with the 500 hPa circulation pattern and the steering flow and is also related to the variation of the main inflow path, the mutual rotation of tropical cyclones and moving velocity variation.