Abstract: At present, the emasculation operation of domestic seed corn production is mainly manual work, and there is a shortage of detasseling equipment, which seriously restricts the development of corn seed industry. In order to solve this problem, a flexible disk extraction seed corn detasseling machine is designed. The equipment takes the self-propelled high clearance chassis as the carrying platform, uses the photoelectric sensor to collect the tassel height signal, adjusts the position of the extraction parts through the four-bar linkage mechanism, and with the rotation of the flexible disk, the corn tassel and its accompanying stems and leaves are collected, clamped, extracted and separated from the plant, thus completing the mother plant removal of tassel. Field experiments showed that the average emasculation rate reached 86.7% at a speed of 5～8 km/h, which could meet the requirements of mechanized emasculation.