Several new sufficient conditions are given for the global attractivity of solutions of a kind of delay difference equations. They either include for improve some known results and put the study of Ladas' conjecture forward.本文得到一类时滞差分方程解的全局吸引性的几个新的充分条件,包含或改进了一些已知结果,把G. Ladas的一个猜想的研究向前推进了。