Rope-shaped washing device

The invention relates to a rope-shaped washing device. The rope-shaped washing device comprises a washing tank, a control system and a detecting device; a first liquid-level detector is arranged in the washing tank; the detecting device comprises a detecting barrel, a circulating assembly and a proportioning barrel; a filtering assembly and a first conductivity detector are arranged in the detecting barrel; a powder box and a water tank are arranged on the proportioning barrel, a discharging pipe is arranged on the powder box, and a first control valve is arranged on the discharging pipe; a water outlet pipe is arranged on the water tank, and a second control valve is arranged on the water outlet pipe; a second conductivity detector is arranged in the proportioning barrel, and an adding pipe is arranged at the bottom of the proportioning barrel; and a one-way valve is arranged on the adding pipe. The circulating assembly pumps washing liquid of the washing tank into the detecting barrel, the conductivity of t