Fish measuring tape

The utility model discloses a fish measuring tape, which comprises a housing, a tape body and a spring, wherein, the housing adopts a hollow column shape, a core shaft is arranged at the middle of thehousing and end covers are respectively arranged at the two ends thereof, the core shaft and the end covers are hinged, and an opening is formed on the housing along the axial direction; the spring takes the shape of a heliciform, and the end of the inner coil is fixed on the core shaft; the tape body takes the shape of a rectangular strip and is wound between the housing and the spring, one endof the tape body is connected with the end of the outer coil of the spring and the other end thereof extends out of the housing from the opening, and a guy cable is connected to the exposed end of thetape body outside the housing; and fish fries and sizes are arranged on two sides of the tape body. The measuring tape can not only be used for measuring the length of a marine product, but also conveniently judge whether the marine product is accord with fishing standards. Besides, users can use and carry the measuring tape conveniently when going out.