From 1990, the Commission on Exploration Geophysics, Geological Societyof China would write a review every year to report some major advances inexploration geophysics in the previous year, and this paper is the second one.In 1990, the application of various major exploration methods to variousfields prodeeded approximately on the same scale as that in 1989, with lotsof technical advances made. Quite a few new China-made seismic instrumentsand equipments passed appraisal, including remote measuring data-collectingsystems, seismic sources and detectors. The application of 3D, high sensiti-vity, S wave and Rayleigh wave seismic exploration and vertical seismicprofile was further broadened. Varied new China-made logging and undergro-und geophysical instruments and equipments passed appraisal, which includednumerical control logging systems and microcomputerized borehole and galleryelectromagnetic wave systems. A number of new microcomputer logging dataprocessing and interpretation systems were developed. In addtiion, several newChina-made microcomputerized instruments for electrical method began to beproduced in 1990. The ground radar system began to be used in engineeringsurvey. In cooperation with Soviet geophysicists, a new electrical method,i. e.,differential normalized method, was tested in oil fields of China with initialresults obtained. Drill holes for the first time arranged directly on the basisof high-precision gravity survey revealed industrial oil flows in 1990. As 1990 was the last year of the 7 th Five-Year Plan in China, this paper has alsomade a brief review on the progress of exploration geophysics gained in vari-ous major fields in the past five years.