Continuous system based spray irrigation uniformity measurement method

The disclosed sprinkling even level detection method based on continuous system comprises: interpolating the detected data to obtain the unknown rainfall depth; when arranging the rainfall cylinders radially, taking two times cubic-spline interpolation to the radial and axial data for the unknown rainfall depth; or when arranging the cylinder as mesh structure, taking two times cubic-spline interpolation to the horizontal and vertical data for the unknown rainfall depth. This invention improves detection precision in theory.