The present invention relates to the field of
textile machinery, and in particular to a
yarn break detection device, comprising a mounting seat, a
yarn drum mounted on the mounting seat, the mounting seat being fixed to a mounting plate, a line-adjusting portion, a first line wheel, a trigger mechanism and a measuring mechanism being sequentially mounted on the mounting plate, the
yarn drum, the line-adjusting portion, the first line wheel and the trigger mechanism being used together for tensioning the yarn wound on the yarn drum, and the trigger mechanism being used for detecting whether the line is broken, the measuring mechanism being used for measuring the
line break position after the line is broken, a positioning mechanism being further mounted on the mounting plate, the positioning mechanism being used for
signal guidance of the detected
line break position. The present invention can detect the
line break time and stop the
machine in time, predict the line break position by the yarn position when the line is broken, and enable the operator to quickly find the line break position for subsequent operations by
signal guidance, thereby saving time, reducing the difficulty of operation, and being convenient and quick.