中文摘要：

根据LS模型参数中钱德勒项的时变性质,提出了基于钱德勒参数时变修正的CLS模型,并用CLS＋AR对极移进行预测。实验结果表明,CLS＋AR模型在极移预测精度上较LS＋AR模型有较大改善。

英文摘要：

According to the time variant characteristic of Chandler wobble（CW） in LS model,we put forward a new CLS model based on correction of time variant parameters of the CW.We use the CLS＋AR model to predict polar motion.The model-building is discussed in detail,and the prediction accuracy of CLS＋AR model is compared with LS＋AR model and other models.The results show significant improvement of the prediction accuracy of the CLS＋AR model in comparison with the LS＋AR model,and this proves the effectiveness and the superiority of the new model.