Abstract: Ruyu No.33, an F1 hybrid with early maturity, was developed by crossing the selling line, 10A-1.2, as the female parent, and 2A-3.8as the male parent.Based on the field as well as lab experiments, the following characteristics of the plant were obtained: (a) the plant was strongly resistant to diseases, cold and heat; (b) the gourds had a green skin with high sheen and round lumps, and was 32-38cm long, 6-7cm in diameter, and 400-500g per single fruit on average; (c) it bore fruits on either main or side branches;and, (d) it had a high yield of more than 45 000kg·hm-2.