Earthworm body length measuring device

The invention discloses an earthworm body length measuring device which comprises a cooling piece. The measuring table is arranged at the top end of the cooling piece, and the cooling piece is used for cooling the measuring table; the first measuring assembly is fixed at the top end of the measuring table, and a first measuring piece is slidably connected to the first measuring assembly; the second measuring assembly is arranged at the top end of the measuring table and corresponds to the first measuring assembly, the second measuring assembly moves relative to the first measuring assembly through an adjusting piece, a second measuring piece is connected to the second measuring assembly in a sliding mode, and protruding ends are arranged on the sides, close to each other, of the first measuring piece and the second measuring piece; the earthworm is located between the protruding end of the first measuring piece and the protruding end of the second measuring piece. According to the invention, the body length o