Fast dissolved granulated calcium magnesium phosphate fertilizer and its production process

The present invention belongs to the field of chemical fertilizer production technology. The said granulated fertilizer is produced by using calcium magnesium phosphate fertilizer powder as base material and humic acid as basic binder, and adding trace elements and water soluble inorganic salt as binding and coating agent during pelletizing. The said fertilizer has main components including P2O5 more than 12.0%, MgO more than 14% and SiO2 more than 20%, and contains rich trace elements. It is suitable for large-area application, may be used as base fertilizer or additional fertilizer, and canimprove soil.