The invention provides an automotive exhaust pipe. The automotive exhaust pipe comprises an exhaust pipe main body and is characterized in that an auxiliary silencer is installed on the exhaust pipe main body and 3 to 5 concave points are uniformly arranged on the outer surface of the exhaust pipe main body portion which is arranged at the front end of the auxiliary silencer along the cross section circumference. The 3 to 5 concave points which are uniformly arranged on the outer surface of the exhaust pipe main body and along the cross section circumference enable an automotive maintenance man to easily and smoothly cut off quick-wear parts on the exhaust pipe main body and play an identifying function which enables the maintenance man to accurately judge out invalid parts. The automotive exhaust pipe has the advantages of facilitating pipe cutting and invalid parts replacement.