The invention discloses a determination method of a surface subsidence position caused by cave-in of a mined-out area, which includes steps of performing underground mining and evenly expanding area of the mined-out area; after reaching a critical big cave-in span, making the cave-in span rise out of the ground surface naturally; through lateral subsidence, forming a collapse pit on the ground surface. The method is characterized in that an expectation position of the center of the collapse pit is the projection position of a cave-in equivalent circle center in the mined-out area on the groundsurface; the long and short half axes of the collapse pit meet the following formula, wherein the formula is as shown in the specification; the determination of surface subsidence position caused bycave-in of the mined-out area is the essential condition for realizing the prevention and cure of safety economy in the dangerous surface subsidence position and sufficiently using the surface non-subsidence land resource of a mine lot. The determination method is applicable to the surface subsidence risk prevention and treatment for mining by an underground caving method and an open-stope methodof a gentle dip and thick mine body, and also to protect the ground surface from subsidence by an open stoping filling method of the mine body, and others.