Grid integrated driving circuit, array substrate and repair method of grid integrated driving circuit

The invention discloses a grid integrated driving circuit, an array substrate and a repair method thereof. According to the repair method, a repair signal line, a first reference signal line and repair units are arranged, wherein the repair signal line and the first reference signal line extend in the arrangement direction of all cascaded shifting registers, and the repair units are in one-to-one correspondence with all the cascaded shifting registers. After the shifting register with a problem in the grid integrated driving circuit is determined, it is required to determine that a signal control end of the repair unit corresponding to the shifting register with the problem and the repair signal line are connected at the overlapping position, a signal input end of the repair unit and the first reference signal line are connected at the overlapping position, a signal output end of the repair unit and a grid line are connected at the overlapping position, and a first reference signal of the first reference signal line substitutes an output signal of the shifting register to be loaded to the grid line to complete repair. Due to the fact that a voltage signal actually output to the grid line is provided by the first reference signal supplied by the first reference signal line, compared with the method that the voltage signal is output to the grid line by a signal supplied by the repair signal line, attenuation of the voltage signal actually output to the grid line is small.