Underwater high-speed moving body can use pre-turbine sensor to measure its own velocity of movement.Dynamic equations of underwater turbine velocity measurement sensor is established

and response rules under steady acceleration and deceleration are analyzed.By using high-speed water tunnel equipment

dynamic process experiments of acceleration and deceleration are designed

and then experimental results are analyzed.Theoretical analysis and experimental results show that dynamic model and experimental results are consistent

dynamic movement rule is agreed with steady-state variation rule.Compared with static measurement value

there are dynamic errors in this underwater turbine speed measurement program in process of acceleration and deceleration

and during acceleration process

the error is large

which requires correction in actual measurement.