The utility model provides a cubical switchboard plum blossom contact temperature monitoring devices belongs to the power equipment field, including having the column member of cavity inner chamber, be equipped with the through -hole that is used for the plum blossom contact to pass at the up end of column member and terminal surface down, be equipped with the louvre on every side at the through -hole, be equipped with protruding muscle at the edge of through -hole, be equipped with the recess that is used for placing pressing blade on protruding muscle, be equipped with passive temperature sensor in the cavity inner chamber. Through fixing the column component on the plum blossom contact to to establish passive temperature sensor in column component cavity inner chamber and hug closely plum blossom contact surface and place, thereby acquire accurate plum blossom contact temperature.