The invention provides a testing apparatus for evaluating the drag-reduction effects of a bionic non-
smooth surface and a bionic jet surface. The testing apparatus comprises a sealing shaft, a power input and
signal output mechanism, a sensor mechanism, a gas-tight
silo and a water distribution mechanism, wherein the power input and
signal output mechanism is arranged at one end of the sealing shaft, the sensor mechanism is arranged at the other end of the sealing shaft, and the gas-tight
silo surrounds the sensor mechanism. The testing apparatus provided by the invention is suitable to be used for testing the drag-reduction effects of a non-
smooth surface and a
surface coating as well as a bionic jet surface; and a
data acquisition system is simple in structure, easy to operate, and accurate in testing. By using the testing apparatus provided by the invention, both the drag-reduction effect of a non-
smooth surface and the drag-reduction effect of a jet
surface structure also can be evaluated. The
fluid friction resistance values of the testing apparatus under different
test sample conditions are acquired by using the
data acquisition system, and then the data comparison is performed so as to obtain the drag-reduction effects of different surface structures, thereby studying the drag-reduction characteristics of a non-smooth
surface structure and a jet
surface structure.