The utility model discloses a semiconductor laser array light beam shaping and illuminating system. The semiconductor laser array light beam shaping and illuminating system comprises a semiconductor laser array, an optical system for transforming divergence angles of fast axis light beams, a device for deflecting angles of light beams on the fast axis direction and an optical system for transforming slow axis divergence angles and deflecting the light beams on the slow axis direction. The semiconductor laser array light beam shaping and illuminating system has the key points that the effect that Gaussian beams of a plurality of laser units are partially superposed and folded is formed in a far field through controlling the deflexion degree of light beam transmission axial cords of each laser unit respectively on the fast axis direction and the slow axis direction, and thereby illuminating light beams which accord with visual field demands are formed. The semiconductor laser array lightbeam shaping and illuminating system has the characteristics of high efficiency, simple structure, low cost and integratable practicability, and is particularly applied as an illuminating light source of an area array imaging laser radar and a laser active illuminating and detecting system.