Abstract: ‘ChunyuNo 2’ is a new and early-maturing summer squash Fl hybrid breeded by crossing white skin summer squash inbred line 007Tai-30-1-1 as female parent with early-maturing green skin summer squash inbred 1ine 9505Qing-2-3-3-6 as male parent. It has vigorous plant, and long rhomboid fruits with vivid white skin. Its yield under protected cultivation is about 75t/hm2 and is 11.4~14.3% higher than that of ‘ZaoqingYidai(CK)’. It has been extended to Shaanxi, Gansu, Hebei etc.