I passed my 12th in year 2025 with pcm stream ,then i again enrolled in 11th and passed 12th in year 2027 , Am i eligible for Viteee examination,my Date of birth us 6 feb 2007

Your age is not a problem . For example, the VITEEE 2026 age criterion required candidates to be born on or after 1 July 2004, so your DOB (6 February 2007) is well within the acceptable range.

However, your Class 12 history may affect your eligibility .

VIT's admission guidelines state that:

• Candidates who have appeared for multiple board examinations in the same academic year are not eligible .
• The prospectus also discusses the first qualifying examination and state of eligibility based on the first Class 12 pass.

Since your situation is not an improvement exam , but a complete re-enrolment in Class 11 followed by another Class 12 , the VITEEE eligibility brochure does not explicitly state whether this is allowed.