Energy-saving type extending-retracting coal mining system

The invention discloses an energy-saving type extending-retracting coal mining system. The energy-saving type extending-retracting coal mining system comprises cutting units, a traction unit and a spray cooling unit; each cutting unit comprises cutting positioning assemblies and cutting moving assemblies connected with the cutting positioning assemblies; the cutting moving assemblies comprise sliding blocks and extending-retracting blocks; the traction unit is connected with the cutting units and provided with a first traction part and a second traction part in a mode of corresponding to firstcutting parts and second cutting parts correspondingly; and the spray cooling unit is arranged inside the first traction part. Through arranged automatic extending-retracting structures, automatic extending-retracting protection of the cutting units can be achieved, and the service life of appliances can be prolonged; and by arranging a water control assembly, a cooling path has selectivity, oneor more cooling spray part