A discontinuous bar chart filtering method based on direction consistency comprises the following steps: inputting a discontinuous bar chart f containing noises, inputting the image under a matlab platform, and matrixing the discontinuous bar chart f containing noises; using the Fourier transform method to calculate the direction consistency of the discontinuous bar chart; using a second order direction partial differential equation based on the direction consistency to filter and import the direction consistency into the second order direction partial differential equation, thus obtaining a second order direction partial differential equation filtering model based on the direction consistency; using the second order direction partial differential equation based on the direction consistency to filter the image, and outputting the filtered image. The method can filter the bar direction consistency, and can increase the diffusion rate in a continuous area so as to fully filter; the method can reduce the diffusion rate in the discontinuous area, thus keeping the boundary of the discontinuous area.