技術摘要（英）
A side mounted fan led pest prevention device is provided. The side mounted fan led pest prevention device includes a cover, a light source device, a trapping device and a fan device. The light source device is connected to the cover. The light source device includes a lamp holder, LEDs and a light guiding element. The LEDs are arranged on the lamp holder. The light guiding element is connected to and protrudes from the lamp holder. The LEDs are located below the light guiding element, and the light guiding element is a curved surface relative to the lamp holder. The trapping device is placed under the cover. The trapping device includes a housing, and a direction from an inlet to an outlet of the shell is defined as an inhalation insect direction. The fan device is installed on the side surface of the housing. The fan device includes an air duct and a fan. The fan is connected to the air duct. The air duct is connected inside the housing. The axial direction of the fan has an oblique upward angle relative to the normal direction of the housing. The fan operation provides an air flow direction, which is different from the inhalation insect direction.