The utility model discloses a hydraulic impact type double-rotor power generation device which comprises a piezoelectric plate fixing shaft, a rectangular piezoelectric plate, a shell, an upper end cover, a wire rotary joint, a fixing screw, a rotary joint fixing screw, a rotary joint fixing bearing, an end cover fixing bearing, an arc end cover, a permanent magnet, a coil bearing, a fixing nut, alower end cover, a coil and a wire. The upper end of the piezoelectric patch fixing shaft is matched with an upper end cover through an end cover fixing bearing; the lower end cover at the lower endof the piezoelectric patch fixing shaft is matched; an arc end cover is mounted at the tail end of the rectangular piezoelectric plate; the tail end of the lower end of the piezoelectric plate fixingshaft is assembled with the coil fixing end; wherein the permanent magnet is arranged in the lower end cover, the rectangular piezoelectric patch wire, the coil wire and the stator wire are connectedat the center of the piezoelectric patch fixing shaft and are led out through the rotor wire, the shell is matched with the upper end cover and the lower end cover through bolt holes, and the wire rotary joint is matched with the upper end cover through a rotary joint fixing screw.