During pumpstarting and pumpstopping process, the initial equilibrium system in the fracturing tubing is broken because of the sudden change of boundary conditions, resulting in water hammer, which then results in the sudden change of fluid flow parameters. Water hammer causes severe vibration, which may damage the tubing or cause sealing failure of premium connections. To quantitatively analyze the water hammer effect and vibration characteristic in pumpstarting and pumpstopping process, characterized lines method and spatial interpolation method were adopted to analyze the velocities and dynamic pressures of fracturing fluid, as well as the axial velocities and additional stresses of tubing at wellhead and different depths. It shows that in pumpstarting process, because the flow rate of fracturing pump group is periodic, the fluid flow pressure in the fracturing tubing will change, resulting in additional stress of tubing, which may cause the vibration of tubing. The fluctuations of dynamic pressure and the axial velocities of tubing decrease with increased depth. In pumpstopping process, influenced by the accumulation of liquid pressure in the tubing, pressure wave is generated near the wellhead and propagates downhole. The change of pressure at wellhead is the largest and the smallest at the bottom. In addition, affected by the change of pressure in the tubing, additional axial tension produced by the fracturing tubing is also the largest at the wellhead and the smallest at the bottom. Compared with the pumpstarting process, the pumpstopping process is easier to damage the tubing.