On the basis of Chinese college students＇ knowledge about English definite article and indefinite article, this empirical re- search aims to demonstrate that task familiarity is closely related to the recasting efficacy of in language learning. The result shows that the learning effect of the experiment objects who are familiar with the task after receiving recast are more obvious than those who are not familiar with the task and the task familiarity is closely related to the recasting efficacy.%以中国当代大学生对英语冠词的学习情况为媒介，进行实证研究来证实学习任务与重铸效果之间的相互关系。研究结果表明：对任务熟悉的实验对象在接受重铸后的学习效果明显好于对学习任务不熟悉的，并且对任务的熟悉程度与重铸的效果相关。
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