The difference between second-grade cucumbers and high-quality cucumbers is the variety. According to the query of relevant public information, the second-grade cucumbers are ordinary vegetable cucumbers, and the high-quality cucumbers are Longyuan Xiuchun dry cucumber variety, 'Nanshui No. 2' cucumber, 'Ningyun No. 3' supermarket cucumber, Shenlu 06, Guo Nong No. 41 fruit-shaped cucumber.