Hello Experts..

I want to ask you please give me solution to how to gain more backlinks in my site and which techniques i will use please suggest me ?

You can use many seo technique, But some technique are is more beneficial for website:
1. Content Posting & sharing
2. Article submission
3. Pdf & PPT sharing
4. Web 2.0 Site submission
5. Bookmarking
6. Infografic