The tight sandstone condensate gas reservoir in Qianfoya Formation of Puguang continental facies is characterized by complex natural fractures and stress fields before compression, complex artificial fracture network after compression, complex multi-scale porous media coupling flow, etc. It is a great challenge to carry out the 3D geological modeling of this kind of condensate gas reservoir with dual media. The tight reservoir is divided into two media, matrix and multi-scale fracture. Based on the discrete offset superposition fusion attribute and seismic wave impedance inversion, the matrix attribute model is established through the combination of step by step frequency division fusion attribute, probabilistic neural network, determination and random phase simulation, and the phased control constraint. According to the idea of combination of well and earthquake and multi-source phase control, the multi-scale fracture model is constructed by integrating the tectonic stress field through the inversion of curvature attribute and the anisotropy in front of stack. Based on microseismic monitoring, fracturing simulation and gas reservoir engineering analysis, the multi-platform joint simulation was used to establish a numerical model of multi-phase, C1-C30+ multi-component and porous fracture media flow. The historical fitting rate was as high as 90%, the model fitting accuracy was high, and the productivity prediction coincidence rate was above 95%.