This application provides an insect trap including a light processing assembly, a circuit assembly, and an installation housing; wherein, the light processing assembly includes a light processing plate and a reflective housing; the reflective housing is fixedly connected to the light processing plate; the reflective housing and the light processing plate enclose a light processing region; wherein, an insect-attracting adhesive is disposed on a surface of the light processing plate facing the reflective housing; the circuit assembly includes a battery, a light source, and a circuit board; the light source is configured to emit insect-attracting light; the insect-attracting light shines onto the light processing region to form transmitted light and reflected light.