Seeding detection device and system of seeder

The invention is applicable to the technical field of photoelectric detection equipment, and provides a seeding detection device and system for a seeder, and the device comprises an air pipe, a guide pipe and a seeding quantity detection unit; the air pipe is used for introducing air flow into the detection device, the air flow is mixed with seeds to be sown, and then the quantity of the seeds contained in the air flow is detected through the quantity detection unit; the seeding quantity detection unit comprises a plurality of laser transmitters and laser receivers, the laser transmitters and the laser receivers are arranged in a ring shape one by one at intervals, and the laser receivers obtain the quantity of seeds contained in air flow passing through the seeding quantity detection unit based on the change condition of laser signals after being influenced by to-be-seeded seeds; the guide pipe is used for guiding the air flow out of the detection device for seeding after the seed quantity is counted by the