Unwinding device for warp knitting machine

The invention discloses an unwinding device for a warp knitting machine. The unwinding device for the warp knitting machine comprises a fixed frame, a cross beam and an unwinding device, wherein the unwinding device is arranged on the cross beam; the frictionally unwinding device comprises a driving unwinding roll, a driven unwinding roll, a driving synchronous belt wheel and a driven synchronous belt wheel; the driving synchronous belt wheel is used for controlling the rotation of the driving unwinding roll; the driven synchronous belt wheel is used for controlling the rotation of the driven unwinding roll; the driving synchronous belt wheel and the driven synchronous belt wheel are connected with a motor driving device; and the driving unwinding roll and the driven unwinding roll are arranged on an unwinding roll fixing plate. The unwinding device for the warp knitting machine has the advantages of guaranteeing the constant-speed unwinding of a cloth roll during unwinding, adjusting the position of cloth conveniently, pressing the unwound cloth flatly and improving the knitting quality of the warp knitting machine.