Abstract:In order to breed new walnut varieties with dwarf, precocious , fruitful and high quality traits which were superior were better than that of ‘Lvling’,, ‘Lvling’ walnut plants were used as parents crossed with ‘Liao ning NO 1’ and ‘Lvzao’ walnut, the 13 traits of 374 hybrid offspring in reciprocal crosses were investigated and itstheir genetic laws wasere analyzed. 13 traits of 374 strains in reciprocal crosses which ‘Lvling’ walnut was as a parent were investigated, and its genetic law was analyzed. The results showed that there existed relatively higher genetic diversities among the phenotypic traits of the hybrid offspring , the variation coefficients of each traits were more than 17%, the highest value reached 70%;%. But that of the fruit related traits were less than 20% except the soluble protein contents. In the 4 cross combinations, the inheritance of transfer ability of green husk percentage and kernel fat contents were more than 97%, that itsand their heredity was greatly influenced by additive effect. The broad-sense heritability of the fruit related traits were more than 90%, and this indicated that their heredities were relatively stable, you can and could be choosen in the early generation. 21 superior trees were primarily selected from the hybrid offspring , principal component analysis methods were used to evaluate them and select superior trees. The results showed that ,according to the cumulative variance contribution which reached 74.3%, 4 principal components which reflected the main economic characters were determined; by calculating the comprehensive evaluation value of each plant, 3 excellent trees from 21 superior trees were selected, and the evaluation results were similar to those of and thetheir actual phenotypes of pereach plants was similar, and found 3 indexes, that were the short bearing branch rate、, dwarf index and internode length canould reflect the excellent dwarf character of walnut.