Open QQ, click Personal Settings, and there is an item in your profile-always display your personal signature, just tick in front.

First, log in your qq account on the computer. After logging in, click the main menu in the lower left corner of the qq panel, as shown in the figure below:

Click the main menu and a pop-up menu will appear. Click Help on the menu, as shown:

After clicking Help, a side-pull menu will appear, and then click My qq Center on the side-pull menu, as shown:

Click My qq Center to enter my qq Center page, and click Dynamic on my qq Center page, as shown:

Click Dynamic to enter the dynamic window, and click My Dynamic on the window.

Click My Dynamic, and you will see the updated QQ personalized signature. Move the mouse over the signature to be deleted, and a delete button will appear. Click the Delete button.