Mineral component and process mineralogy characteristic of middle and low grade phosphate deposit are important study objects for reasonable phosphate resource usage. In this paper, by the study of mineral component, occurrence characteristic, dissociation, granularity analyses and so on of three stratums of phosphate deposit in Guizhou Province, the influence of the wrappage in collophanite was carried out, and on the basis of present study, it can make the dissociation of collophanite and its intergrowth matrix ore farthest by grinding to +