Abstract: The uncertain socioeconomic model is first built that of investment preventing from disaster and soil utilizing. Compared with economic model built before, the uncertainty of disaster was mastered first, and investment preventing from flood was connected with the choosing action of soil purchasing. On this basis, multi-area general equilibrium theory was quoted, the action of consumer was studied by utility theory under the condition of uncertainty, the diverse value view of consumer, that is economic main body was researched by random utility theory. The socioeconomic not only can master the action of diverse social economic main body under the condition of uncertainty, analyze the effect of investment preventing from disaster, but also can analyze the running mechanism of the choosing area action connecting with investment preventing from disaster. This paper illustrates the practicability of this economic model by the investment preventing from flood and knowing in advance the effect of soil utilizing in a certain area inside the country.

Key words: disaster preventing investment, soil utilizing, uncetainty, economic model