Yes friend UB constable with graduation and experience of over 10 year’s are eligible for CBI but firstly you will have to appear for the UPSC exam.

Eligibility:

Those candidates who have completed their graduation with a minimum of 55% marks are eligible to appear for this exam.

Must be citizens of India.

Minimum age shall be 18 years, and the maximum age shall not be morethan 27 years
Relaxation is provided as per the govt rules.
3 years age relaxation for OBC category candidates,
5 years age relaxation for SC/ST category candidates,
10 years age relaxation for PWD candidates.
SC/ST/OBC candidates must be atleast 30 years when they apply.

The candidates who qualify in the written test will be later called for a Physical Test and Interview.

Physical Requirements:
Height:
i. For men -165cms.
ii. For women -150cms
Height relax able for Hillsmen and Tribals: 5cms

Chest:
76cms. with expansion (There shall be no such requirement in case of female candidates)

Vision
Eye-Sight (with or without glasses)
Distant Vision :6/6 in one and 6/9 in other eye.
NearVision:0.6 in one eye and 0.8 in other eye