Optical detection device for pesticide aqueous solution

The invention provides a pesticide aqueous solution optical detection device, which comprises a waterproof shell with an internal space and a detection end, a display arranged on the waterproof shell, a detection channel formed at the detection end, and an aqueous solution containing a pesticide for washing vegetables and fruits and flowing in the detection channel, the light source module and the sensor are arranged in the internal space of the waterproof shell and are positioned at the detection end; the light source module emits a detection light beam which penetrates through the aqueous solution to the sensor, and the sensor generates spectral information; the processor is electrically connected with the light source, the sensor and the display and is arranged in the internal space; and the processor processes the spectral information and displays a result message on the display according to a processing result, so that a washing person can immediately confirm the pesticide residue condition of the vegeta