Target recognition by using neural network based on high resolution range profile (HRRP) with wide band millimeter wave (MMW) radar was researched. Time delay neural network (TDNN) model and its learning algorithm to range profile sequence input were studied first, the TDNN target recognition method based on range profile sequence with wide band MMW radar was proposed. The effect of time delay unit number on classification precision and the performance of TDNN classifier using three typical aircraft dark room data measured with scale model were studied. The results show that the proposed method has good application prospects.