Linear noise combined suppression method and system

The invention discloses a linear noise combined suppression method and system, and the method comprises the steps: carrying out the dynamic correction of a CMP gather, and obtaining a dynamic correction CMP gather; carrying out superposition on the dynamic correction CMP gathers, and constructing a superposition imaging profile; determining a time horizon of the linear noise according to the superposition imaging profile; mapping the time horizon of the linear noise to the dynamic correction CMP gather; performing reverse dynamic correction on the CMP gather and the time horizon mapped to the dynamic correction CMP gather, and sorting the time horizon to a shot domain to obtain shot domain data; and linear noise in the shot domain data is removed. According to the method, the linear noise time horizon is accurately picked up on the stacked section, the linear noise time horizon is mapped to the dynamic correction CMP gather and sorted to the shot domain after reverse dynamic correction, and then linear noise