Abstract: The position error exits in the border area of image which is generated by the traditional projection algorithm.The complete projection algorithm which is presented in this paper can solve the problem.The near-field projection relation was deduced from the imaging equation with the stationary phase algorithm.Respectively,the simulated scattering data of array was processed by the arc projection algorithm,the extended coherent processing(ECP),the spherical back-projection(SBP) and the algorithm presented.The effect and the calculation speed of these algorithms were compared.From the comparison results,it is concluded that the complete projection algorithm is a effective near-field imaging algorithm,which can generate near-field image accurately and rapidly..