Fishing line lock

The invention provides a fishing line lock which comprises a first special-shaped piece, at least one spring, a tongue depressor, a cylinder and a second special-shaped piece. A first key groove is formed in a first fixing portion, a tongue depressor groove is formed in the edge of a line clamping portion in the thickness direction, at least one spring groove is formed in the tongue depressor groove, the spring is inserted into the spring groove, the tongue depressor is inserted into the tongue depressor groove and abuts against a compression spring, the cylinder is connected with the line clamping portion so that the cylinder can be located at an opening of the tongue depressor groove, the side face of the cylinder abuts against the tongue depressor, the second special-shaped piece is provided with a second key groove corresponding to the first key groove, and the second special-shaped piece is rotatably connected with a connection portion. The fishing line lock is fixed to a waist belt of a fisher through the first key groove and the second key groove, so that the finishing line lock is convenient to carry and fix; the fisher can wind a fishing line onto the cylinder, then the finishing line is pressed by means of the tongue depressor, the fishing line can be easily and conveniently wound and clamped, the whole device is convenient to carry, operations are easy to carry out and attractiveness is not influenced.