The machine is compeletely mounted with tractor.During operation, the discs is rotating to thrn the soil.Particularly, it is suitable for operation on the field with grasses, straw and stems of crops or plants,big soil resistance and with many stones and brickbat,etc. in the field, it is good at cutting the grasses and straw and free from stopped by the grasses, soil and stones,etc. It is easy to adjust and strong and durable.