According to statistics, building energy consumption accounts for 33% of the country's total energy consumption, in which rural building energy consumption accounts for 20%, and with the continuous advancement of new rural construction, various policies to benefit the people have been promulgated successively, this proportion will increase year by year.However, at present, the focus of building energy conservation work is concentrated in urban areas. Rural houses lack technical guidance on energy conservation in buildings. The self-built model is basically adopted, which consumes too much energy. Therefore, based on the CFD numerical simulation technology, this paper takes some rural houses in Xi'an as a research object, simulates its outdoor wind environment, combined with the wind environment evaluation standard, the existing problems of rural houses are analyzed, and the improvement scheme is proposed. After the adjustment, the simulation analysis again showed that when the angle between the rural house building and the wind direction in Xi'an is 45 degrees, the comfort of human living environment is the best, which provides a reference for future energy conservation and consumption reduction in rural areas.