The study used the orthogonal experimental method to analyze the significant impact of various factors on the vegetation performance of porous concrete. The results showed that the plant growth was good during the experiment, and at 70 days, the height of grass plants in each experimental group could reach about 40cm, indicating that porous concrete has good plant growth performance. There are significant differences in the thickness of the test specimens at different levels, with the plant height of the 6cm thick test group being significantly higher than that of other levels, indicating that the thickness of porous concrete specimens is an important factor affecting grass height. The smaller the thickness of the specimen, the better the plant growth performance. The porosity of porous concrete, specimen thickness, and coarse aggregate particle size all significantly affect the weight of vegetation. The larger the coarse aggregate particle size and porosity, the more suitable it is for plant growth. Among them, porosity has the most significant impact on the weight of grass planted.