Interactions between minerals and microorganisms, especially microbial weatherng of silicates which has been concerned much for its important significance in circulation of matters and evolution of topography, are important processes in subsurface of the Earth. As the most popular silicate on the Earth's surface, feldspar usually undergoes microbial weathering through three models: the fluid model, the biofilm and fungal hyphae. Usually, microorganisms can enhance decomposing feldspar by the proton and ligandpromoted mechanisms. The rate and degree for microbial weathering of feldspar are always affected by many factors such as physiological behaviors of microorganism, category of microorganisms and metabolites, growth condition and category, structure, composition of feldspar as well. It is believed that the researches on models, mechanisms, impact factors of interactions bewteen feldspar and microorganisms are very instructive in the investigaton of the geomicrobiology of silicate.