Abstract: The residual ratio iteration termination condition for matching pursuit (MP) method was developed. It can erase the disadvantage of the traditional termination condition which can not terminated in terms of an ultrasonic signal with extremely low SNR. The error criterion is used to monitor the acceptability of the unitnorm vector obtained by the matching pursuit performance. Moreover, the matching pursuit operation will continue until the error ratio is less than a predetermine threshold. The error criterion is an important factor for the signal approximation while noise level is unknown. The numerical simulations and experimental results prove the good performance of the proposed approach which is robustness to be as an iteration termination condition for MP method.