Based on Fluent 6.3 software, the Reynolds mean Navier-Stokes equations were selected to simulate 3D steady wind field of complex dish frame. Computational domain model which conform to unrestraint flow field and grid independent solutions was built by applying multi-angle wind modeling methods with inner domain subarea on cylindrical. And, 45 group results of total wind load, wind pressure distribution and flow around characteristic were acquired by simulation. Change regulations of wind load with different working condition were analyzed, and, the reasonableness of simulation results were verified by qualitative comparative analysis between load curve and parabolic radar antenna wind tunnel test. The ratio of condenser mirror load on total wind load of frame was explored by adopting dimensionless method. Condenser shape factor distribution and extremes of each subarea load were acquired under typical working conditions. And, load generating mechanism was revealed by further analysis of the flow around characteristics, which provide a load basis on wind-resistant design of the whole structure of dish photo-thermal solar energy.