The invention provides a pixel structure which comprises multiple data lines, multiple scanning lines, multiple pixels, a common voltage line, a voltage detection unit and a voltage compensation unit. The scanning lines and the data lines intersect, each pixel is located in a region formed by intersecting the corresponding data lines and the corresponding scanning lines, the common voltage line is connected with the pixels, the voltage detection unit is connected with the data lines and detects voltages on the data lines, the voltage compensation unit is connected with the data lines and used for compensation of the voltages on the data lines, so that the brightness difference value of the different pixels corresponding to the scanning lines is minimum, linear cloud patterns with the same bright and dark patterns can be reduced or eliminated, and image display quality of a liquid crystal display panel is improved.