Thanks all for your reply i also searched this on Internet and found many of the points that are:
1: Remove unnecessary plugins and extensions
2: Employ browser caching
3: Image Optimization
4: Use the best Content Management System
5: Make use of Content Delivery Networks
6: Delete/replace all broken links
7: Choose a Good Web Host
and also found this post on the internet and found this is very help full for me, i remove all the unnecessary plugins and optimize the site images this help me a lot to to boots up the load time