If you take out the business loan in your name then yes the business loan will affect your personal credit score.
If you never miss a payment and the loan stays in good standing then your credit rating should go up. If you default on the loan then the credit score and rating will go down and you could potentially lose any personal belongings.
If you start a business make sure you incorporate it as an LLC limited liability company so they won't come after personal assets such as your car and house if your business goes under.