驾驶证是每个驾驶员必备的合法证件，它的扣分制度是为了保证道路交通的安全和秩序。根据规定，如果一个驾驶人的驾驶证被扣除21分，那么驾驶证将会被自动注销。那么，驾驶证扣了21分后，会在多长时间内被自动注销呢？下面我们来详细解答。

Driving license is an essential legal document for every driver, and its point deduction system is designed to ensure road safety and order. According to regulations, if a driver's license is deducted 21 points, the license will be automatically cancelled. So how long does it take for a driving license to be automatically cancelled after being deducted 21 points? Let's find out in detail.

首先，我们需要知道驾驶证的分值和扣分规则。一般情况下，驾驶证总共有12分，每年可以增加3分。如果驾驶员违反交通规则，交警部门会根据违法行为对驾驶证进行相应扣分，扣分数目根据不同的违法行为而异。当扣分累计到一定程度时，就会触发驾驶证自动注销的机制。

Firstly, we need to know the points and rules of the driving license. Generally, a driving license has a total of 12 points, with an annual increase of 3 points. If a driver violates traffic rules, the traffic police department will deduct points from the driving license according to the nature of the violation. The number of points deducted varies depending on the specific violation. When the accumulated points reach a certain threshold, the mechanism for automatic cancellation of the driving license will be triggered.

其次，在中国，如果一个驾驶人的驾驶证在一年内被扣除了12分以上，他将会被吊销驾驶证，需要重新参加考试才能重新获得驾驶资格。而如果驾驶人的驾驶证在两年内被扣除了12分，但没有达到吊销标准，那么他将会被警告并要求参加交通安全学习教育。因此，扣分数目和时间都是影响驾驶证注销的重要因素。

Secondly, in China, if a driver's license is deducted more than 12 points within one year, the license will be revoked, and the driver will need to retake the exam to regain driving qualification. However, if a driver's license is deducted 12 points within two years without reaching the revocation standard, the driver will be warned and required to participate in traffic safety education. Therefore, both the number of points deducted and the time frame are crucial factors affecting the cancellation of a driving license.

最后，如果一个驾驶人的驾驶证达到了累计扣分21分的标准，那么他的驾驶证将会被自动注销，并且需要重新参加考试才能重新获得驾驶资格。然而，具体的注销时间并没有固定规定，它会根据驾驶人的具体情况和相关政策来决定。因此，无法给出一个确定的天数。

Finally, if a driver's license reaches the 21-point threshold for accumulated deductions, the license will be automatically cancelled, and the driver will need to retake the exam to regain driving qualification. However, there is no fixed regulation on the specific cancellation time. It will be determined based on the driver's individual circumstances and relevant policies. Therefore, a specific number of days cannot be given.

总之，驾驶证扣了21分后会自动注销，但具体的注销时间会因个人情况和政策而异。驾驶人应当严格遵守交通规则，合理驾驶，避免违法行为，以免驾驶证被注销，造成不必要的麻烦。

In conclusion, a driving license will be automatically cancelled after being deducted 21 points, but the specific cancellation time may vary depending on individual circumstances and policies. Drivers should strictly abide by traffic rules, drive responsibly, and avoid violations to prevent their driving licenses from being cancelled, causing unnecessary trouble.