Optical pest control device

An optical pest control device, including a first main body, a second main body, at least two first light sources, at least two first photosensitive elements, at least one second light source, and a processing unit. The second light source is positioned between the at least two photosensitive elements in a second direction. After retrieving a position and an area of a shading region, the processing unit controls the second light source according to the retrieved position to emit a second light beam aiming at the shading region when the retrieved area is smaller than a valve value, and stops the second light source from emitting the second light beam when the retrieved area is no longer smaller than the valve value. Thereby, the second light source can be turned off in time when a human body inadvertently falls into an effective region of the optical pet control device from either side of the second direction, thus improving the safety of the optical pest control device.