Simultaneous information and power transfer over the wireless channels potentially offers great convenience to mobile users. In wireless communication information and power transfer is very challenging task. To perform this task it is important to harvest energy and information decoding. Therefore for wireless communication system needs to developed technique which is suited for wideband and high data rate transmissions. Orthogonal Frequency Division Multiplexing (OFDM) is digital transmission technique developed into a popular scheme for wideband communication systems. So in this paper, the authors study the optimal design for Simultaneous Wireless Information and Power Transfer (SWIPT) in downlink multiuser OFDM systems.