The invention discloses a self aircraft under water driven by the mixed power. It includes the main body, the fixed vane, the vertical tail vane, the horizontally fixed bow rudder and a canula screw thruster. In the dome, it is installed with the flotage driving out bladder, the flotage driving pressure capsule with the flotage driving system, the guise adjusting pressure capsule with the pitching adjusting system and the navigation system, the electric source and controlling system pressure capsule which are all connected with out water directly. By using the triangle vane, it is proper to improve the gliding effect when gliding; by using the horizontal bow rudder and the vertical tail rudder, the guise and the track can be controlled in the AUV mode to help the guise control in the gliding mode, the pitching guise adjusting system can reach the guise control in gliding mode. So it can monitor and detect the big field water for long time.