The invention relates to pseudomonas putida SRPG-396 and salt-dissolving and growth-promoting application thereof, and belongs to the field of agricultural biotechnology. The accession number of the bacterial strain is CGMCC No. 9397. The bacterial strain has the functions of dissolving inorganic phosphorus, and secreting auximone and siderophore, can improve the absorption of elements such as nitrogen, phosphorus, potassium, calcium, iron, and the like by crops, reduce the absorption of sodium, has good salt resistance, can effectively relieve salt stress of crops caused by salinized soil and promote growth of crops under salt stress. When compared with a control, the bacterial strain can significantly improve the germination rate, dry weight, and plant height of crops such as cotton, tomatoes, capsicum and the like under salt stress. The bacterial strain of the invention has the advantages of stable functions, strong environment adaptability, and ecological environment friendliness, can be prepared into products such as microbial agents, biological fertilizers, and the like, has great development potential for industrial products, and has good application prospects.