The invention relates to a zero-forcing precoder design method based on image structure similarity. According to the technical scheme, known stable transfer function matrix functions of discrete channels are H (z), sub-channels distributed to the jth user are Hj, and j = 1, 2-M ', M' represents the number of users. And a sending image sj to be sent to the jth user by the base station is interferedby white noise with known power spectrum in the transmission process. According to the channel transfer function matrix H (z) and a zero forcing condition, calculating a structural similarity expression between an image received by a user and an image sent by a base station to obtain a parametric expression of a precoder F (z); And the optimal parameter in the F (z) expression is obtained according to the LMI linear inequality, so that the structural similarity between the image received by the user and the image sent by the base station is maximized. The method has the advantages that the method is simple, low limiting power can be adapted, and it is guaranteed that a user receives image structure information to the maximum extent.