Loading speed is too slow, when will EA solve this problem

Perform a clean boot before playing: http://support.microsoft.com/kb/929135

If you can, you should try connecting directly with an Ethernet cable rather than wirelessly as this will give a more stable connection.

Also try the troubleshooting steps in the following help.ea articles:

https://help.ea.com/article/connection-issues-with-origin

https://help.ea.com/article/programs-that-may-cause-conflicts-with-origin