Considering　importance　of　mill　load　parameter　on-line　measurement　in　realization　operational　optimization　and　control　of　the　mineral　grinding　process,　ball　mill　grinding　mechanism　numerical　simulation　and　mill　load　parameters　soft　measurement　for　the　mineral　grinding　process　were　reviewed.　First,　the　mill　load　was　described　based　on　the　actual　grinding　process.　Then,　definitions　of　mill　load,　mill　load　parameters　and　mechanism　model　among　them　were　reviewed,　and　the　mill　load　detection　framework　was　given　out.　Second,　current　status　of　numerical　simulation　analysis　for　the　grinding　process　was　reviewed,　and　the　difference　between　the　grinding　mechanisms　of　different　ball　mills　was　given　out　and　the　possibility　of　soft　measuring　mill　load　based　on　support　of　numerical　simulation　was　discussed.　Third,　mill　load　parameter　soft　measurement　methods　&　techniques　based　on　multi-component　mechanical　signals　were　reviewed　in　detail.　Finally,　the　developing　trend　and　the　problems　that　need　to　be　solved　were　summarized.　Results　show　that　the　soft　measurement　of　ball　mill　load　parameters　is　difficult　using　the　normally　method.　An　intelligent　soft　measuring　model　with　characteristic　that　simulate　domain　experts＇　dynamic　cognition　and　compensation　mechanism　must　be　constructed.　Moreover,　the　shortcomings　of　domain　experts　should　be　overcome.　Thus,　the　intelligent　soft　measurement　of　mill　load　parameter　can　be　realized.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.