The invention discloses a dragon fruit row type planting rack and a construction method thereof. A-shaped racks, tripods and supporting columns of the planting rack are connected through steel strand ropes, the tripods at the two ends of each planting row are fixed on the ground through vans, and the supporting columns are arranged between every two adjacent A-shaped racks. The A-shaped racks are arranged every 4-6 m in the corresponding planting row, dragon fruit trees are planted every 1 m in the row, and the dragon fruit trees are fixed through supporting frames. By means of the dragon fruit row type planting rack and the construction method thereof, the yield per unit area is increased by 500-1000 kilograms compared with a traditional single-column planting method, fruit bearing branches and tendrils of the dragon fruit trees can evenly droop to be arrayed on the two faces of each A-shaped rack, obvious ventilation belts, illumination belts and fruit bearing belts are arranged, the branches and tendrils can be evenly irradiated, ventilation is good, the sprouting ability of the branches and tendrils is high, the branches and tendrils can grow vigorously, and plant diseases and insect pests are reduced. Operating lanes are located between every two adjacent planting rows, operating is convenient and efficient, and the land utilization rate is higher.