A new kind of optical antenna for multi-spectral light communication with large gain and wide field of view is proposed.The fore-receiving optical antenna is based on the reversed telephoto optical system and consists of three negative lenses in front and four positive lenses behind.By theoretical analysis and optimization with Zemax,the field of view (FOV) reaches 90° and the optical gain is up to 115,and the size is also compact.The antenna is appropriate for multi-spectral light communication.By cooperating with multi-spectral wavelength division multiplexing system,its FOV is up to 90°×22° and its optical gain is 20.Moreover,the antenna can be independently used as an optical system for wide FOV imaging systems and front-end system of imaging spectrometers.