The invention provides a grid drive circuit, a grid drive method and a display device. The grid drive circuit comprises a drive control unit and a grid signal generating unit. The drive control unit is used for generating different drive control signals suitable for different display modes. The grid signal generating unit is connected with the drive control unit and responds to the drive control signals generated by the drive control unit to generate multi-order grid voltages, wherein the width of low-order voltages in the multi-order grid voltages is adapted to the corresponding display mode. According to the grid drive circuit, when the corresponding display device is in a flicker mode, the multi-order grid voltages with the wide low-order voltages are used for driving display, so that frame flickers are eliminated; when the corresponding display device is in a gray scale mode, the multi-order grid voltages with narrow low-order voltages are used for driving display, so that V-Block is avoided, and therefore the display quality of a flame is improved.