Box staff and photovoltaic support height measuring device

The utility model relates to the technical field of measuring box staff, in particular to a box staff and a photovoltaic support height measuring device. The box staff comprises a connecting piece and a telescopic ruler, the top surface of the connecting piece is used for being connected with the bottom surface of a photovoltaic support purline, and the telescopic ruler is connected to the bottom surface of the connecting piece; and the extension scale can extend from the bottom surface of the connecting piece to the direction away from the connecting piece, and after extending, the extension scale can retract to the direction close to the connecting piece. The photovoltaic support height measuring device comprises the box staff. The utility model provides a box staff and a photovoltaic support height measuring device, so as to alleviate the technical problems that errors exist when the box staff measures the height of a photovoltaic support and the measurement process is relatively tedious in the prior art.