Research conclusions: (1) There is no obvious vertical velocity of the groundwater flow on both banks of the Qiantang River. (2)The horizontal velocities of phreatic water and artesian water are far less than 5m/d. (3)The groundwater's velocity and flow direction on both banks of the Qiantang River have a little influence on the construction of the river-crossing section of Line 2 of Hangzhou metro with freezing method.(4)In the case of no influence by nearby engineering construction (such as precipitation), the velocity of the groundwater in the Hangzhou area is generally slow with little influence on the construction of the metro engineering or municipal tunnel project with freezing method. So it is proposed it is unnecessary to do the determination of the velocity and flow direction of the groundwater during the engineering investigation in future.