Hi 1447690168@qq.com,
Once you log into your NXP account click on: Software Licensing and Support

Then in the Product List, you should be able to see the SPT Toolbox download link.

I've rechecked the link this morning and it's fine: https://nxp.flexnetoperations.com/control/frse/download?element=10084387
Perhaps it was a glitch in www.nxp.com when you have tried to download.
Hope this helps!
Daniel