Abstract: This is an essay in the field of mineral processing engineering. Contamination of MgO and R₂O₃ emanating from dolomite and silicate in phosphate ore from Guizhou province has been a problem in phosphate ore processing. This study explored Scrubbing classification- Optoelectronic beneficiation- froth flotation to remove dolomite and silicate away from this phosphate ore. The phosphate minerals could be concentrated to 33.52% P₂O₅, with a recovery of 95.69%, and the content of MgO reduced to 0.82%, the content of Fe₂O₃+Al₂O₃ reduced to 2.84%. Additionally, scrubbing classification and photoelectric beneficiation can obtain qualified concentrate with a yield of 72.88%, which can greatly reduce the amount of ore entering the flotation operation and reduce the beneficiation cost.