Abstract: In this paper true time delay based on optic fiber dispersion is applied in a multi-beam receiving network of optically controlled phased array antenna. The network based on the fiber dispersion characteristic is composed of dense wavelength division multiplexing (DWDM) and optical fiber delay module which includes optical switches and optical fiber rings. The DWDM is used to combine multi-channel optical wavelength signals. Several orders of optical fiber rings and optical switches are used to form optical delay modules adjust the delay of multi-channel optical wavelength signals, and then achieve the beam scanning. Under this principle, an optical receiving network with 16 channels for receiving wavelength signals and two beams forming is designed. The ability of covering a range -40°to +45°with a direction of 16 beams and the switching speed≤30 us is achieved. At last, Thebeamforming capability is demonstrated in microwave darkroom.