Integrated dust-free primary-secondary saw

An integrated dust-free child-mother saw comprises a machine table. The machine table is provided with a rotatable mother saw and a driving device in driving connection with the mother saw, the machine table is further provided with a child saw, and the child saw is connected with the driving device through a belt; the first adjusting mechanism is connected with the primary saw and used for adjusting the primary saw up and down, the second adjusting mechanism is used for adjusting the secondary saw up and down, a driving device is matched with a belt to drive at least three mechanisms, so that the rotating speeds of the three mechanisms are matched, and the rotating speed of the primary saw and the rotating speed of the secondary saw are matched. The driving device is arranged on the main saw and is directly connected with the main saw, it is guaranteed that the main saw can reach the maximum rotating speed, a belt is prevented from slipping, finally, adjusting mechanisms are arranged at the positions of the