This paper introduces the contents about engineering geological properties of soil mass presented in the 3rd National Conference of Engineering Geology

held in Chengdu

Sichuan

Dec. 1988. Based on this

the engineering geological properties of soil mass and their researching developments are described

in view of some kinds of soil distributed in China

or with specific characteristics. Such as loess

expansive soil

dispersive soil

red clay

marine clay

and fly-ash soil.