A steel strip weight based hot-dip galvanized finished product coil shearing optimization method belongs to the technical field of hot-dip galvanization production control. An optimization setting calculation process is added to a steel strip shearing setting module to perform optimization calculation on a shearing set value. The steel strip weight based hot-dip galvanized finished product coil shearing optimization method has the advantages that in the process of carrying out shearing setting, via determining the status of a welding seam of a steel strip in a production line and considering a coating weight, calculation is carried out to obtain the steel strip weight for calculating shearing optimization setting; and then finished product coil shearing optimization setting calculation is performed according to a finished product coil shearing target, a shearing setting parameter is determined, and correction of a sheared position is further performed by combining a distance between the sheared position and the position of the welding seam, so that the yield of the steel strip is improved.