Abstract: This article proposes a combined shape estimation system of long linear array based on non-acoustic sensor method and hydrodynamic model solving method.The system makes full use of the non-acoustic sensor information to further solve real-time array shape of the tactical towed array according to the hydrodynamic model.Through the data analysis,this system's estimate accuracy can be increased by more than 10% compared with traditional array shape estimation algorithm,which has a higher guiding significance to practical engineering applications.