Portable fish measuring ruler for survey of fishery resources

The invention relates to the technical field of fishery resource survey, and discloses a portable fish measuring ruler for fishery resource survey, which comprises a supporting seat, a fish fixing mechanism is mounted on the lower surface in the supporting seat, and a fish measuring scale line is arranged on one side, located on the fish fixing mechanism, of the lower surface in the supporting seat. A first handle is mounted on the left side surface of the supporting seat, and a pull rod mechanism is arranged on the lower surface of the supporting seat; fish samples in the fishery resource survey are fixed through the second clamping plate and the first clamping plate in the fish fixing mechanism, and the body length of the fish is determined through the position of the indicating sheet at the fish measuring scale line; the supporting base can be lifted through a first handle, the fish measuring ruler is convenient to carry, an adjusting plate in an opening and closing mechanism can be pulled to enable a lift