Hydrocarbon prospect appraisal by trace element spectral diagram is a new geochemical technique,developed on the basis of Russian geoelectrochemical exploration methods. Field tests show that spectral diagrams of electrochemically extracted trace elements Ti、V、Cr、Mn、Co、Ni、Cu、Zn in soil samples from within and outside oil production area have distinct characteristics. Based on these differences of spectral diagrams of trace elements in soil samples and the correlation coefficients of the spectral diagrams with standard soil sample from oil-bearing area, the hydrocarbon prospects of the study area can be evaluated and delineated. By the correlation coefficient anomalies of trace element spectral diagram in soil samples one oil-bearing prospect in Wugucheng area, which is in consistent with results of alkane geochemical analysis and self-potential anomaly and audio-frequency magneto-telluric anomaly, and 3 oil-bearing prospects in Jiyuan area are predicted. In 2001 and 2002 the predicted oil-bearing prospects were verified by the following drilling wells.