The invention discloses a novel method for carrier multi-path inversion of a GNSS receiver. The method comprises the steps of: obtaining a relationship among a direct signal, a reflected signal and acombined signal through a carrier multi-path; and calculating the relationship between the carrier multi-path and the signal quality to obtain a carrier multi-path inversion method. According to themethod, accurate coordinates of known points do not need to be obtained in advance, complex algorithms such as precise single-point positioning are not needed, namely, the carrier multi-path error canbe inversed only through the signal-to-noise ratio of a period of continuous observation time, the field work cost and time are greatly reduced, and the method is simple and efficient and is not considered in the previous algorithms. According to the method, the multi-path error of each epoch carrier phase can be estimated and corrected in real time, sidereal day daily filtering or an inter-epochdifference algorithm is not needed, more effective observation values can be utilized, and powerful guarantee is provided for GNSS data processing.