Range-gated imaging laser radars provide laser active image and passive image simultaneously. Data fusion of laser radar image and passive optical image is an implementation of complementary information, which can improve capability of target recognition and anti-interference. Laser radar image is fused with passive optical image at pixel-level. The fusion strategy for the range-gated imaging radar and three-dimensional reconstruction are given. Data fusion of laser active intensity image and passive image retains rich information of passive optical image, and removes the background outside of the target. The data synthesis of the fusion image and range image provides a three-dimensional image. The experimental results show that the resolution of image fusion has been improved effectively while the range information of active image is retained with the methods above.