Underground layered water injection device and using method thereof

The invention discloses an underground layered water injection device and a using method thereof. By arranging a ground central control module, a wellhead signal module, an underground signal receiving and transmitting module, an intelligent injection allocation module, a CDMA potential detection module and respective internal functional units, intelligent remote control over underground layered water injection operation is achieved, the operation condition of water injection construction can be fed back to the ground in real time, and the construction quality of the water injection operationis effectively guaranteed; and meanwhile, compared with traditional cable type underground layered water injection equipment, the device adopts a corresponding electromagnetic wave transmitting unit and a signal intensifier to transmit digital instructions, damage easily caused by operation in a well body with complex terrain conditions to cables and equipment is avoided, and the application rangeof water injection constr