A dismountable flooring block comprises a flooring block body, having a first mounting edge portion and a second mounting edge portion, the first mounting edge portion and the second mounting edge portion being thinner than the flooring block body and being laterally extended from the flooring block body. Two mounting members are respectively disposed on an upper surface of the first mounting edge portion and on a bottom surface of the second mounting edge portion, in which a mounting direction of the first mounting edge portion and a mounting direction of the second mounting edge portion are both parallel to an up-and-down direction of the flooring block body, thereby enabling the mounting member of the flooring block body to mount to a mounting member of another flooring block body.