A saline-alkali resistant strain D8 was screened from the rhizosphere soil of saline-alkali soil in the Hetian area of Xinjiang，and the biological characteristics of the strain D8 were studied.The experimental results showed that the D8 strain had a broad spectrum of carbon source preference，beef paste，sucrose，maltose，and glucose were all their preferred carbon sources，while D8 strain had a narrower preference for nitrogen sources，showing a clear preference for peptone.The results of the growth curve measurement showed that D8 strain grew slowly in the first 8h.At 26 h，it reached the stable phase of the logarithmic growth phase.The salt-alkali removal experiment showed that the pH-reducing performance of D8 strain was obvious，but the salt-reducing process did not change significantly.The experimental results of different initial pH concentrations showed that D8strain had strong alkali resistance ability，pH 8 and 9 were suitable for its growth.When pH reached 11，the growth of the strain was greatly inhibited.