Measuring device

The utility model relates to a measuring device which is used for measuring the height difference of two objects to be measured and comprises a fixed assembly and a movable assembly, the fixed assembly comprises a measuring piece and a first alignment piece, and the movable assembly comprises a movable piece and a second alignment piece. The first alignment piece is arranged on the surface of one to-be-measured object, then the moving piece is moved in the scale direction of the scales of the measuring piece until the second alignment piece is arranged on the surface of the other to-be-measured object, and then the scale number, pointing to the measuring piece, of the indication mark on the moving piece is read. When one end of the first alignment piece and one end of the second alignment piece are aligned with a first plane perpendicular to the scale direction, the indication mark points to a certain scale line of the scale, and the obtained value is the height difference of the two objects to be measured. T