Cutting knife rest capable of swinging to lift and drop knives

The utility model belongs to the field of stone cutting machines, and particularly relates to a cutting knife rest capable of lifting and lowering a knife in a swinging manner, which comprises a rack, a mounting seat arranged on the rack in a swinging manner and used for mounting a cutting saw knife, and a driving device connected with the mounting seat and used for driving the mounting seat to swing, the driving device comprises two swinging arms which are oppositely arranged on the rack left and right and are connected with the mounting seats respectively and can swing, a driving mechanism arranged on the side edge of the rack and a connecting rod mechanism connected between the driving mechanism and the mounting seats, and the driving mechanism drives the mounting seats to be matched with the swinging arms to work through the connecting rod mechanism. By means of the movement mode, in the cutting work of the cutting saw blade and the granite material to be cut, the cutting saw blade makes contact with the