Abstract Existing resonant tunneling modes in the shape of line-type resonances can improve the transport properties of the junction. Motivated by the unique structural properties of monolayer WSe 2 e.g. significant spin–orbitcoupling and large direct band gap, the transport properties of a normal/ferromagnetic/normal WSe 2 junction with large incident angles in the presence of exchange field ( h ), off-resonance light ( Δ Ω ) and gate voltage ( U ) is studied. In a certain interval of U , the transmission shows a gap with optically controllable width, while outside it, the spin and valley resolved transmissions have an oscillatory behavior with respect to U . By applying Δ Ω ( h ), an optically (electrically) switchable perfect spin and valley polarizations at all angles of incidence have been found. For large incident angles, the transmission resonances change to spin-valley-dependent separated ideal line-type resonant peaks with respect to U , results in switchable perfect spin and valley polarizations, simultaneously. Furthermore, even in the absence of U , applying h or Δ Ω at large incident angles can give some spin-valley dependent ideal transmission peaks, making h or Δ Ω a transmission valve capable of giving a switchable fully spin-valley filtering effect. These findings suggest some alternate methods for providing high efficiency spin and valley filtering devices based on WSe 2 .