The utility model relates to a protection type cement mortar stirrer belongs to laboratory glassware's technical field. Including the cement mortar stirrer body, the positive position of cement mortar stirrer body is put and still is equipped with the ash blocking board, the fixed L type connecting rod that is equipped with in cement mortar stirrer body upper portion, ash blocking board upper portion is equipped with connecting portion, connecting portion with L type connecting rod is through bolted splice. It still is equipped with the ash blocking board to put through the positive position at the cement mortar stirrer body for the dust that flies upward out passes through the ash blocking board, prevents it to fly upward operating personnel standing position and puts, inhales its no powder's purpose with this reduction personnel.