The present invention relates to a bacterial strain, Streptomyces psammoticus OMK-4, and a method for vanillin production by fermentation of the bacterial strain. The method of the fermentation includes the following steps: activating the strain, culturing the seed, fermenting, extracting and so on. This method using ferulic acid as one of the raw materials to produce vanillin through microbial fermentation is safe and environmentally friendly.