这是因为打开了键盘的“插入建”，导致输入出现问题，和输入法无关。具体解决方法如下。
1，首先，在文档中点击任意一处，是电脑处于输入文字的状态。
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2，当电脑处于输入文字状态的时候，点击一下键盘上右侧的“insert”/“ins”键。
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3，点击之后，再次进行文字的输入，就不会自动删掉后面的文字了，可以正常进行输入。
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