Abstract: The multi-element of x fluorescence spectrometry is applied for scanning work at about 4.05km² external prospecting area of a goldmine in northwest of Sichuan province.Through the measurement of the indicator elements of As，Pb，Cu，Zn，Fe，the gold mineralization belt is prospected and delineated.With the aid of γ-ray spectrometry and rapid soil  easurement of α，the favorable gold occurrence location is captured after the final comprehensive chemical analysis of gold.This provides a basis for the engineering planning，and improves the rate of success on ore prospecting in external gold mine.

Key words: XRF, Indicator element, Rapid measurement of α, Gold prospecting