What about my PF and investment from my current employer.

I am working for IT company, They have nominated my name for the h1b, and i hope ill be getting my approval in upcoming days.

I want to know whether my salary structure and all other benefits, will continue back in india when ill be working in US for different employer,

If not, what will be happening at the end before my departure. or in what way ill be associated with my current emloyer.

You have to discuss this w/ employer. By law, they are required to pay you your US salary as per the LCA. What they pay in India is b/w them and you.