The invention provides a hydraulic-set separate-layer simultaneous-extraction string. In order to overcome the defects that a rod, a pipe and a plunger are eccentrically worn seriously and the sucker rod is broken since an oil well pump of a conventional separate-layer simultaneous-extraction string receives a large pressure load during deep-well development, the hydraulic-set separate-layer simultaneous-extraction string adopts the structure that an oil well pump is a bridge type separate extraction pump, a packer is a hydraulic packer, the lower end of an oil pipe is fixedly connected with the bridge type separate extraction pump, the hydraulic packer and an anti-blocking valve in sequence, another oil pipe is mounted between the hydraulic packer and the anti-blocking valve, the anti-blocking valve is located on a lower oil layer, and the bridge type separate extraction pump is located on an upper oil layer. The hydraulic-set separate-layer simultaneous-extraction string has the beneficial effects of simple structure and reasonable design, can effectively prevent the phenomenon that the sucker rod, the oil pipes and a plunger are eccentrically worn in a crude oil lifting process, greatly reduces the non-production operation time of replacement and maintenance, improves the productive efficiency and is particularly suitable for deep-well crude oil extraction operation.