Automatic granular fertilizer sampling device and sampling method

The invention relates to an automatic granular fertilizer sampling device and a sampling method. Comprising a granular fertilizer finished product belt conveyor, the top of the granular fertilizer finished product belt conveyor is provided with a rotary double-channel sampling unit for sampling hour samples and comprehensive samples, and the tail end of the rotary double-channel sampling unit is provided with an automatic rotary storage unit for storing the hour samples and the comprehensive samples; the rotary dual-channel sampling unit is obliquely arranged, a power driving unit is arranged at the upper part of the rotary dual-channel sampling unit, and an automatic rotary storage unit is arranged at the lower part of the rotary dual-channel sampling unit; the automatic sampling device has the advantages of realizing automatic sampling without the operation of sampling personnel, reducing the labor intensity of workers, ensuring the sampling time, improving the sampling accuracy and avoiding sampling deviat