A compound prism module is provided, including: a first prism, a second prism, and an interface filling medium. The first prism has a first light-incident surface, a first reflecting surface, and a first light-emitting surface, where the first light-incident surface and the first light-emitting surface are connected to a first side edge, and the first light-incident surface and the first reflecting surface are connected to a first chamfered plane. The second prism has a second light-incident surface, a second reflecting surface, and a second light-emitting surface, wherein the second light-incident surface and the second light-emitting surface are connected to a second side edge, and the second light-incident surface and the second reflecting surface are connected to a second chamfered plane. The first light-incident surface and the second light-incident surface are connected to each other, and the first side edge and the second side edge are parallel to each other.