The distribution patterns of soil microorganisms in five plant communities including Phragmites australis，Boraginaceae，Limonium bicolor，Z． Macrostachys and Suaeda glauca were studied at Wudi shell bars in Shandong Province． The results show that the orders of magnitude of bacteria，fungi and actinomycetes were 104，104，and 102，respectively，in all vegetation communities． The contents of bacteria，fungi and actinomycetes in August were approximately 0． 45，6． 16，and 3． 61 times higher than those in June，respectively． In the soil layer of 0-30 cm，the contents order of microorganisms in the vegetation communities followed a descending order as Limonium bicolor ＞ Z．Macrostachys ＞ Suaeda glauca ＞ Boraginaceae ＞ Phragmites australis． Bacteria dominated in Z． Macrostachys vegetation communities，while the majority of microorganisms were fungi and actinomycetes in plant communities of Phragmites australis and Suaeda glauca． The vegetation species and microorganisms were linearly correlated，with a highly significantly coefficient (p ＜0． 001)．