The utility model discloses a belt cleaning device is filtered in acid bath, including the silk bundle filter, be equipped with the air valve on the silk bundle filter, advance sour valve, the sour valve of play and blowoff valve, still including dirty sour collection device, plate filtration machine, filter residue processing apparatus useless admittedly and clean fluid recovery unit, the blowoff valve is connected with dirty sour collection device, and dirty sour collection device is connected with the plate filtration machine, and the plate filtration machine is connected with filter residue processing apparatus useless admittedly, clean fluid recovery unit respectively, and the device reduces the emission of acid bath in the silk bundle filter cleaning process, reduction water for washing, and water consumption reduction alleviates sewage treatment and loads, and the processing is convenient for send outside in giving up admittedly of formation.