Agropyron cristatum L. （2n = 4x = 28， PPPP） with a large amount of alien elite genes are valuable genetic resources for the genetic improvement of wheat. According to previous studies， the genes on chromosome 1P of A.cristatum can improve plant leaf shape. However， it is unclear that the leaf shape changes and possible linkage drag exist in the translocation lines. The aim of this study is to detect the genetic effect of wheat-A.cristatum translocation lines T1PS·1AL and T1AS·1PL on major agronomic traits in different wheat backgrounds， in which wheat-A.cristatum translocation lines 1PS and 1PL were crossed with eight common wheat varieties， followed by investigation and analysis of agronomic traits in F₂ segregation population. The results showed that A.cristatum chromosome short arm 1PS reduced the length of top third leaves and its plant height reduction level was 3-8 cm while no significant difference on yield traits were discovered. Furthermore， the plant phenotype of the translocation line T1AS·1PL were shaped with a decrease in the grain yield than those of non-translocation plants. Offspring performance of translocation Chromosome in related to both wheat genetic backgrounds and A.cristatum alien chromosome. Finally， we screened 75 F₂ individual plants with favourable leaf shape and unchanged yield traits to be used for wheat breeding. In conclusion， this study reported two pre-breeding germplasms of wheat-A. cristatum 1P translocation lines had significant genetic effects on plant architecture improvement， which could guide the future utilization of A. cristatum 1P chromosome translocation fragments.