FISHING LINE LOCK

A fishing line lock comprises a first special-shaped piece (1), at least one spring (5), a tongue depressor (4), a cylinder (3) and a second special-shaped piece (2). A first fixing portion (11) is provided with a first key slot (111). A tongue plate groove (134) is formed in the edge of a line clamping portion (13) in the thickness direction. At least one spring groove (133) is formed in the tongue plate groove. The spring is inserted into the spring groove. The tongue depressor is inserted into the tongue plate groove, and abuts against and compresses the spring. The cylinder is connected with the line clamping portion so that the cylinder is located at an opening of the tongue plate groove. The side face of the cylinder abuts against the tongue depressor. The second special-shaped piece is provided with a second key slot corresponding to the first key slot, and the second special-shaped piece is rotatably connected with a connection portion. The finishing line lock is convenient to carry and fix, and the f