A partial transmit sequence (PTS) algorithm based on peak optimization is presented in terms of the defect of the high peaktoaverage ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) systems. The algorithm estimates the maximum peak power of each sampling position by analyzing their characteristics and the metric function Pn is obtained. The computational complexity is reduced by optimizing the sample point where Pn is equal or to greater than the preset threshold γ. Compared with the PTS algorithm and the reference［20］, the PAPR performance, to a certain extent, is improved when the computational complexity and the bit error rate performance are almost the same.