The invention discloses an ICI self-elimination algorithm with variable coding efficiency, and belongs to the technical field of communications. The ICI self-elimination algorithm mainly solves ICI problems caused by phase noise. According to the ICI self-elimination algorithm, when pre-coding is conducted at a transmitting end, an OFDM symbol is used as a unit to serve as an input code element, a coding process is described in a generated matrix mode, and the coding efficiency can be regulated through design of the structure of a generated matrix. According to the ICI self-elimination algorithm, on the basis of a self-elimination algorithm with variable coding efficiency, aiming at the ICI coefficient characteristics cause by phase noise, the optimized conditions of elements of the generated matrix are designed, and the error code performance of a system is further enhanced.