Bar waste collecting device

The utility model relates to a bar waste collecting device which is provided with a rack, conveying rollers for conveying bars are installed on the rack at intervals, and a first collecting unit and a second collecting unit are arranged on the portion, on the rear sides of the conveying rollers, of the rack in the bar conveying direction. A first sensor and a second sensor are arranged on the rack below the conveying roller where the first material collecting unit is located at the interval of 4.1 m, and a third sensor is installed on the rack below the conveying roller where the front portion of the second material collecting unit is located. When the first sensor and the second sensor in the first material receiving unit are matched with each other to detect that short bars appear on the conveying roller, the short bars fall into the material receiving groove of the first material receiving unit to be collected, and when the third sensor detects the conveyed bars, the short bars fall into the material recei