How to delete all messages in qq space?

You can't delete them all at one click, only in batches.

QQ space message batch deletion:

1. Open a space to enter the home page and click "Message Board" in the home page navigation.

2. After opening the message board, enter our message board interface.

3. Find "Message Board Settings" and move the mouse to the small inverted triangle icon on its right.

4. After clicking "Batch Management", we can see that there are several boxes in front of the message options. Let's check the box in front of "Select All" and click "Delete Selection".