The invention discloses a needle 
bed swing mechanism for a multi-bar Raschel 
warp knitting machine, which comprises a transmission spindle, an eccentric wheel fixedly mounted on the transmission spindle, an 
oil tank output bar, an upper swing arm, a looping swing arm shaft, a guide arm and a connecting rod support. One end of the upper swing arm is fixedly connected with the looping swing arm shaft, the other end of the upper swing arm is rotatably connected with the upper end of the 
oil tank output bar, the upper end of the guide arm is slidably connected with a grooved needle 
bed, the lower end of the guide arm is fixedly connected with the looping swing arm shaft, a stylet 
bed is slidably connected with the grooved needle bed, an eccentric 
bushing connecting rod and a triangular connecting rod are arranged between the eccentric wheel and the 
oil tank output bar, the lower end of the eccentric 
bushing connecting rod is sleeved on the eccentric wheel, the upper end of the eccentric 
bushing connecting rod is rotatably connected with the bottom end of the triangular connecting rod, the left upper end of the triangular connecting rod is rotatably connected with the connecting rod support, and the right upper end of the triangular connecting rod is rotatably connected with the lower end of the oil tank output bar. The coefficient of swing travel speed ratio of the needle bed swing mechanism is approximate to 1:1, the needle bed swing mechanism is well applicable to high-speed 
warp knitting and is simple in structure and reliable in operation, and a transmission circuit of the needle bed swing mechanism is short.