Abstract: The filtered-x least mean square (FxLMS) algorithm used in the traditional active noise control (ANC) for vehicle interior noise requires relative high-cost hardware due to large calculation amount, which is impractical to mass production. Therefore an improvement scheme using direct digital synthesizer to generate reference signal and filtered reference signal is proposed, which makes up for the deficiency in phase errors of a secondary path delay model, and has the advantages of simple structure and less calculation amount. Finally, based on CompactRIO, a narrowband ANC system with two-channel delayed notch in vehicle is established and the road tests are carried out in two conditions of vehicle stationary with a constant engine speed and rapidly accelerating in vehicle driving. The experiment shows that vehicle interior noise is reduced effectively by the scheme proposed, the A-weighted sound pressure level (SPL) of the overall noise is reduced by 8.46 dB(A) in rapidly accelerating condition, which provides a reference of engineering applications for active noise control.