I complete 60 minutes of exercise today but the heart challenge is not show it on my watch.

Be patient. It may take up to 9 days after completing the activity to earn the award. For more info, see the "Get help" section in:

Earn Activity awards using your Apple Watch - Apple Support

If you can't wait, sometimes restarting your watch & iPhone will speed-up the process.

How to restart your Apple Watch - Apple Support

Restart your iPhone - Apple Support

Restart the watch and phone,I had to do this twice before the award appeared.