The invention provides an efficient analyzing method for a superfine line structure object electromagnetic property, and belongs to the field of analyzing of a computational electromagnetic moment method. A section wavelet serves as a primary function in the moment method, fast wavelet transform is used, a sparse matrix can be obtained through calculation, and therefore the defects caused by a dense matrix are overcome, and a effect more accurate and efficient than that of traditional analyzing can be obtained. The method comprises the steps that firstly, an object is placed in an appropriate geometry coordinate system, and an electric field integral equation to which the surface current conforms is listed; secondly, the section wavelet serves as the primary function to carry out expansion on an unknown current; thirdly, geometry mapping is established and is substituted into an original matrix equation; fourthly, the matrix equation is solved; fifthly, the current distribution is obtained through solving, and the scattering problem is dealt with to obtain far field distribution. The method can serve as an efficient and accurate means for studying a wire antenna, and plays a significant role.