The invention discloses a needle pressing mechanism of a hooked-needle warp knitting machine. The needle pressing mechanism comprises a needle pressing block, a needle-pressing swinging arm and an oil-tank main shaft, wherein the oil-tank main shaft is rotatably arranged in an oil tank of the warp knitting machine; the needle pressing block is fixedly arranged at the upper end of the needle-pressing swinging arm; the lower end of the needle-pressing swinging arm is fixedly connected with a loop-forming swinging shaft of a loop-forming mechanism of the warp knitting machine; the needle pressing mechanism also comprises an eccentric wheel, an eccentric sleeve connecting rod, a triangular rocker and a connecting rod, wherein the eccentric wheel is fixedly arranged on the oil-tank main shaft; the lower end of the eccentric sleeve connecting rod is sheathed on the eccentric wheel, and the upper end of the eccentric sleeve connecting rod is rotatably connected with the lower end of the triangular rocker; the upper end of the triangular rocker is rotatably connected with the lower end of the connecting rod; a rod body of the triangular rocker is rotatably connected with a machine frame of the warp knitting machine; and the upper end of the connecting rod is rotatably connected with a rod body of the needle-pressing swinging arm. The needle pressing mechanism disclosed by the invention has the advantages that not only is the structure simple, but also the needle pressing block has the stopping process at the movement limit position, yarns on a hooked needle can realize looping smoothly, the needle missing phenomenon is avoided, and the quality of the fabric is guaranteed. The needle pressing mechanism is especially suitable for being used on the hooked-needle warp knitting machine.