Soil phosphatase activity play a role in the process of mineralized P in soil. Phosphatase can be produced by plants and soil microbia extracellularly. The effect of PSM inoculant and P fertilizer dose towards soil phosphatase can be seen in table 3. Based on soil analysis results in end vegetative phase toward phosphatase on maize showed the application with multi level doses of fertilizer P and the various PSM didnt give significant effect. It is expected to be due to the high rainfall during the research that can lead the fertilizer and incoulant leached. In addition, giving the treatment of inoculant once in this researched led to the unoptimum activity of PSM effecting the content of soil phosphatase