Disassembling method of flat stand supporting column group in shallow pit type movable stand

The invention relates to a dismounting method of a flat stand supporting column group in a shallow pit type movable stand. Comprising the steps that steel columns needing to be disassembled are divided into a first row of steel columns closest to a front end inclined stand, a second row of steel columns arranged behind the first row of steel columns and a third row of steel columns; for the first row of steel columns, the inclined stand main truss and the lifting lugs installed on the inclined stand are used for carrying out laying-down and dismounting operation; the second row of steel columns and the third row of steel columns are put down and detached through the steel columns which are not detached on the side temporarily and the nearby lifting lugs installed on the fixed stand; the steel wire rope penetrates through the different combination fixed pulley assemblies and then is fixed to the electric hoist and a hoop of the target steel column. By means of the wheel and rope combination system and the help