The invention discloses a quantitive analysis method of single-frequency seismic scattering noise, and belongs to the technical field of seismic data quality analysis. The method comprises the steps that terrain data are acquired first, linear dispersion is conducted on a terrain boundary, linear units which are not repeated with one another are obtained, then the green function from nodes on the terrain boundary to the linear units under the single-frequency seismic scattering noise is calculated, the green function between the nodes is calculated according to the green function from the nodes to the linear units, and the mutual influence of the seismic scattering noise between the nodes is represented by the green function between the nodes; a scattering energy matrix H under the terrain single-frequency seismic scattering noise is obtained according to the green function between the nodes, the characteristic value of the matrix H is calculated, and the complexity of the single-frequency seismic scattering noise of terrains is quantitatively represented by the characteristic value. According to the quantitive analysis method of the single-frequency seismic scattering noise, quantitive analysis of the seismic scattering noise is achieved, important value is achieved for selecting seismic sources and processing seismic data in seismic data collecting, and the quantitive analysis method is particularly suitable for complex terrains such as mountainous regions.