The method to cancel the synchronization of personalized signature to QQ space is as follows:

1. Click on the phone interface to open QQ.

2. Click on the avatar in the upper left corner of the newly opened interface.

3. In the newly opened menu, click the "Settings" button at the bottom of the interface.

4. Click the "Contact, Privacy" setting item in the newly opened interface to enter.

5. In the newly opened interface, close the "Speaking of QQ Space" button.