Earth volume estimation method

The invention discloses an earthwork volume estimation method, and relates to the field of earthwork construction, and the technical scheme of the invention comprises the following steps: S1, collecting two stages of LiDAR DEM; s2, acquiring a relative system error of a non-working area; s3, establishing an error fitting model; s4, solving an error fitting model by using a reweighted least square method; s5, calculating the relative system error of the working area according to the error fitting model; s6, relative system errors of the constructed working area are eliminated; s7, carrying out statistics on the excavation and fill corresponding to each pixel; and S8, the construction earthwork volume of the working area is counted. According to the method, the relative system error of the working area is fitted by using the relative system error polynomial of the non-working area, and then the influence of the relative system error is eliminated before excavation and fill calculation, so that the construction