Steel tube wall thickness measuring tool with flexible rule

The utility model discloses a steel tube wall thickness measuring tool with a flexible rule, comprising a bracket and a pointer showing dial indicator, wherein the bracket is a metal bracket and comprises an upper cross rod, a lower cross rod and a connecting seat, wherein one end of the upper cross rod and one end of the lower cross rod are connected with the connecting seat; the dial indicator is fixed on the other end of the upper cross rod; the dial indicator is positioned at one side of the upper cross rod, which is far away from the lower cross rod; a movable rod of the dial indicator penetrates through the upper cross rod; one side of the other end of the lower cross rod is close to the upper cross rod and provided with a contact terminal; the movable rod is aligned to the contact terminal; the upper cross rod and the lower cross rod are both telescopic rods; the connecting seat is in a cubic structure and internally provided with the flexible rule; and a restricted entry of the flexible rule extends o