The invention relates to the technical field of industrial control, and particularly relates to a line cutting machine. The line cutting machine comprises a bracket, a line cutting mechanism and a line collecting mechanism, wherein a line connecting opening is formed in the line connecting surface of the bracket, the line collecting mechanism is used for receiving broken lines which are cut by the line cutting mechanism, the line collecting mechanism comprises a line pushing device and a storage box which is capable of adjusting the capacity and is used for automatically storing the broken lines, and the line pushing device moves back and forth on the line connecting surface at preset time intervals so as to push the broken lines to fall into the line connecting opening and then fall into the storage box arranged below the line connecting opening. The broken lines which are cut by the line cutting mechanism are pushed to the line connecting opening by the line pushing device and then are stored in the storage box, so that the problem that lines cannot be sent by the line cutting machine due to accumulated broken lines is solved.