The invention discloses a sandwich type longitudinal-torsional complex excitation active water spraying propulsion device and a driving method thereof. The problems that a current piezoelectric water spraying propulsion device is small in driving force, low in power density and the like are solved. The sandwich type longitudinal-torsional complex excitation active water spraying propulsion device comprises single crystal wafers for valves, metal base plates for valves, end covers, supporting rubber rings, sealing rings, cavities, fastening bolts, a pump cavity driving assembly, an amplification membrane, a clamping block, a metal base plate for pumps, a front end cover and fastening screws; and each cavity is provided with a valve cavity water inlet, a pump cavity water inlet and a pump cavity water outlet, each valve cavity water inlet is provided with a driving valve base for valves, each pump cavity water inlet is provided with a driving valve base for pumps, and a hydrophobic structure is arranged on each pump cavity water outlet. Electric signals are applied to the single crystal wafers for the valves and the pump cavity driving assembly so as to generate stretching deformation and centrifugal force correspondingly, the volumes of the valve cavities and the pump cavities are alternatively changed, and flowing in and spraying out of fluid are achieved; and under the counter-acting force of sprayed water, propulsion of the device is achieved. The sandwich type longitudinal-torsional complex excitation active water spraying propulsion device and the driving method have the beneficial effects of being large in driving force, high in power density and the like, and have wide application prospects in the field of trace injection, military surveying and the like.