An important goal of wheat breeding is to develop high-yielding varieties by better ideotype, leaf angle is mainly factor contributes to ideal crop architecture for high yield. Moreover, our understanding of the contribution of leaf gesture traits to grain yield is still limited. In this study, a mutant lad1 was characterized which has decreased leaf angle (leaf angle distribute between 0-10°). The genetic mapping indicated that the suppression of TaLAD1, encodes a protein containing predicted Ribonuclease H-like domain, involved in the wheat development of plant height and leaf angle. The expression pattern of TaLAD1 gene is tissue-specific which has higher expression level in spike and lamina joint than that in root and leaf. Especially in mutant lad1, expression level was rarely detectable in all tissues. Meanwhile, superior genotype of TaLAD1 was screened from the mutant library which slightly reduced plant height and leaf angle but without adverse phenotype. This result indicated that the functions of TaLAD1 in plant height and leaf angle regulation process provide a novel target gene for designing wheat ideotype in which both traits could be favorably improved.