A cable connection system including a cable connection device and a printed circuit board having a bottom and an upper surfaces, the cable connection device being arranged to connect a coaxial RF cable to the printed circuit board, where the printed circuit board has a signal transmission pattern on one surface thereof and a ground surface on the other surface thereof, the cable connection device comprising: a solder block configured to be connected to the printed circuit board, and wherein the solder block comprises; a flat central body having a supporting opening in which the coaxial RF cable is to be inserted; and a pair of auxiliary bodies (22, 23) extending from both sides of the central body in a same direction as the central body, being the direction upwards or downwards, and the auxiliary bodies being stepped in a protruding shape, and wherein the printed circuit board has a cutout portion where an edge of the printed circuit board is cutout and removed, and a pair of thru-holes (16, 18) is formed at both sides of the cutout portion, wherein the solder block is configured to be soldered to one surface and/or the other surface of the printed circuit board so that the central body and the auxiliary bodies extend through and are inserted in the cutout portion and the thru-holes, and wherein at least one central body and cutout portion are provided, and at least one pair of auxiliary bodies and thru-holes are formed, and wherein step portions (d1, d2) between the central body and the auxiliary bodies have a depth deep enough to allow a central line of the coaxial RF cable, when inserted in the supporting opening of the central body protruding through the cutout of the printed circuit board, to be in contact with the signal transmission pattern of the printed circuit board. a solder block configured to be connected to the printed circuit board, and wherein the solder block comprises; a flat central body having a supporting opening in which the coaxial RF cable is to be inserted; and a pair of auxiliary bodies (22, 23) extending from both sides of the central body in a same direction as the central body, being the direction upwards or downwards, and the auxiliary bodies being stepped in a protruding shape, and wherein the printed circuit board has a cutout portion where an edge of the printed circuit board is cutout and removed, and a pair of thru-holes (16, 18) is formed at both sides of the cutout portion, wherein the solder block is configured to be soldered to one surface and/or the other surface of the printed circuit board so that the central body and the auxiliary bodies extend through and are inserted in the cutout portion and the thru-holes, and wherein at least one central body and cutout portion are provided, and at least one pair of auxiliary bodies and thru-holes are formed, and wherein step portions (d1, d2) between the central body and the auxiliary bodies have a depth deep enough to allow a central line of the coaxial RF cable, when inserted in the supporting opening of the central body protruding through the cutout of the printed circuit board, to be in contact with the signal transmission pattern of the printed circuit board.