In order to improve seabuckthorn for both fruit production and for rise in soil erosion contro1, Chinese Seabuckthorn (H．rhamnoides subsp. Sinensis) as male parent was crossed with Mongolian Seabuckthorn (H.rhamnoides subsp. Mongolica) as female parent. The Mongolian cultivar has large fruits and few or nearly no thorn. Crossbreeding trial was started in 1995. Forty-five hybrid individual trees were selected in 1997. Experimental results indicated that the selected 45 hybrids were most significantly larger than the female parents in height, ground diameter and crown width, but most smaller than the male parents. The number of thorns in 2-year-old branches of the hybrids was 0~4，falling between the numbers of thorns in male and female parents. The 100-berry-weight of hybrids was 20.10～63.17g, except for seven individuals which showed exceeding parent fact, most significantly smaller than that of the female parents, but 0~206.75％ larger than that of the Chinese cultivars. Compared with their parents, The results showed that the hybrids were intermediate in most characters. It also indicated significant correlation of 100-berry-weight with berry length, width and length of fruit stem. 1000-seed-weight was significantly correlated with length and width, and great significantly with thickness. Comprehensive evaluation results showed that the ecological adaptability and economic value of the selected thirteen hybrid individual trees were obviously higher than female parent and male parent respectively, and the ecological and economic value of the selected hybrids was excellent.