【Objective】Rhizosphere bacteria play a key role in plant stress resistance and nutrient acquisition. However, the community structure and culturable potential of rhizosphere bacteria in soda saline-alkaline soils remain poorly understood. 【Methods】In this study, rhizosphere soil samples of seven common wild grass species (including Suaeda glauca, Phragmites australis, and Setaria viridis) were collected from four typical soda saline-alkaline areas in the Songnen Plain: Da"an, Zhaoyuan, Zhenlai, and Tongyu. The bacterial community structure was analyzed by high-throughput sequencing of the 16S rRNA gene, and high-throughput cultivation using 1/10 TSB medium was conducted to assess the cultivation preferences of different taxa.【Results】Results showed that: rhizosphere bacterial abundance ranged from 1.79×109 to 1.24×1010 gene copies/g d.w.s, and significant differences in diversity were observed among plant species: Taraxacum mongolicum exhibited high abundance and high diversity; Artemisia capillaris had low abundance but high diversity; Plantago asiatica and Phragmites australis showed both low abundance and low diversity. Principal component analysis indicated that while the rhizosphere bacterial communities of different wild plant did not differ significantly, sampling location significantly influenced the rhizosphere bacterial community structure. The dominant bacterial taxa were generally consistent across plant species. At the phylum level, Proteobacteria was the most abundant (26.3%), followed by Actinobacteria (17.2%) and Acidobacteria (11.3%). The dominant genera included Arthrobacter, Microvirga, Bacillus, Ramlibacter, Skermanella, Rubrobacter, Sphingomonas, and Nocardioides. High-throughput cultivation yielded 117 pure bacterial ASVs, belonging to 52 genera and 4 phyla. The isolation efficiency averaged 3.1 genera and 7.1 pure strains per 100 positive wells. Frequently isolated taxa included the phyla Proteobacteria, Firmicutes, and Actinobacteria, and the genera Pseudomonas, Lysinibacillus, Rhodococcus, and Limnobacter. Notably, five of the top eight most relatively abundant genera in the rhizosphere were successfully cultured.【Conclusion】In conclusion, at a broad geographic scale in the Songnen Plain soda saline-alkaline region, sampling location rather than plant species was the primary factor driving rhizosphere bacterial variation. Although different bacterial groups exhibited distinct cultivation preferences, high-throughput cultivation proved to be an effective method for capturing most dominant taxa, demonstrating its utility for mining rhizobacterial resources in saline-alkaline soils.