Control unit with high control precision and assembly line

The invention discloses a control unit with high control precision and an assembly line. The control unit comprises a machining mechanism, wherein an independent control unit is arranged below the machining mechanism; the control unit comprises a driving motor, a switching device, a slideway II, a transmission device, a workbench, a moving device connected with the driving motor, a slideway III assembled with the moving device and a chain wheel assembled with the transmission device. According to the control unit, the workbench is driven by adopting a transmission unit consisting of a servo motor, the chain wheel and the transmission device and a high-precision screw motor, different working systems can be designed for different working tasks, and compared with a traditional assembly line or a traditional machining device, the control unit has the advantages that the efficiency is higher, and the control precision is higher; the switching device is arranged and can be switched between chain transmission and h