Measuring tool for wall thickness and external diameter of steel pipe

The utility model discloses a measuring tool for wall thickness and external diameter of a steel pipe, which comprises a bracket and a dial indicator, wherein the dial indicator adopts a pointer to realize displaying; the bracket made of metal comprises an upper cross rod, a lower cross rod and a connecting rod; one ends of the upper cross rod and the lower cross rod are connected with the connecting rod; the dial indicator is fixed at the other end of the upper cross rod and is located at one side of the upper cross rod far away from the lower cross rod; a movable rod of the dial indicator passes through the upper cross rod; a contact is arranged at one side of the other end of the lower cross rod close to the upper cross rod; the movable rod is aligned with the contact; a scale layer is arranged at the lower edge of the lower cross rod along the length direction; and both the upper cross rod and the lower cross rod are telescopic.