System and method for eliminating anamorphose of tunnel LED display screen

The invention discloses a system for eliminating anamorphose of a tunnel LED display screen. The system comprises an ARM and an FPGA, wherein the ARM is connected with a correlation tube A and a correlation tube B and is connected with a frequency division preset value latch U1 and a latch U7; the frequency division preset value latch U1 is connected with a time schedule controller U3 and a clock frequency divider U2; the clock frequency divider U2 is connected with an external crystal oscillator, the time schedule controller U3 and a position data shift pulse counter U6; the time schedule controller U3 is connected with a frame storage set, the latch U7, a band preset value counter U8, a band scanning column number counter U9 and a position data shift output control circuit U4; the latch U7 is connected with the band preset value counter U8; the band preset value counter U8 is connected with the position data shift pulse counter U6; the position data shift pulse counter U6 is connected with the position data shift output control circuit U4; the position data shift output control circuit U4 is connected with an LED light band drive circuit. The system is convenient to use and excellent in effect.