This paper makes spot investigation and research on plant species, deployment mode and deployment effect of Chongqing Jinyun Square, the results show that in Jinyun Square there are total 73 green species plants, that the ratio of arbor, shrub and herbage is 1.5:2.1:1, that the ratio of foliage plant and flower plant is 7.1:1, that the ratio of green leaf and colorful leaf is 7.1:1, that the ratio of broadleaf and conifer is 13.6:1 and that the scale ratio of each seasonal landscape is 1.8:1.9:1.6:1, the deployment mode mainly includes group planting, avenue-style planting, coupled planting, paired planting and potted planting and so on, the majority of the plants in the Square are native plants with unified mode which highlight local culture, however, there are problems such as simplistic landscape in winter, mismanagement and so on. The author suggests that maintenance management in the future should be consolidated, that the plants for viewing should be increased and that the variety of plant communities should be emphasized.