The invention discloses an isosceles trapezoid cantilever beam-based piezoelectric-electromagnetic energy capture device, which comprises a base, wherein the base is in a form of a regular polygon; each edge is provided with a cantilever beam; the cantilever beams are in a form of an isosceles trapezoid, the bottom edges of the cantilever beams are fixedly connected with the corresponding edges of the base and the cantilever beams and the base are located in the same plane; each cantilever beam is provided with a piezoelectric plate; the upper surface and the lower surface, far away from the base, of each cantilever beam are provided with a first permanent magnet and a second permanent magnet respectively; each first permanent magnet is provided with a first induction coil; a second induction coil is arranged at the lower part of each second permanent magnet; each first induction coil is fixedly connected with the corresponding second induction coil through a connecting rod; each first induction coil is provided with a fixed pulley; each fixed pulley is provided with a connection line; and one end of each connection line is connected with the corresponding first induction coil and the other end is connected with the corresponding first permanent magnet. The isosceles trapezoid cantilever beam-based piezoelectric-electromagnetic energy capture device can adapt to random broadband low-frequency, large-amplitude and high-strength vibration in the environment; and the energy recovery efficiency is high.