electrical and hydraulic compound nanopositioner This design is in the motor - driven magnetroheological on the basis of the installation of hydraulic system so that it is common to give impetus to magnetroheological line round feed motion. the design of complex nanopositioner motor part by the ball screw drives hydraulic part by hydrocylinder actuaton magnetroheological, by the second part of the connection. design of the main stage of the mechanical structure design, appreciating and hydraulic system are several aspects: magnetroheological of the transmission mechanism design, mainly the application of the ball screw; magnetroheological blockmodel laryngofibroscopy design, understanding, take full account of the main controdiction, grpwth ystems; control system design, familiarize its application stepmotor feed can be accurate location but there are shortcomings is inadequate, so the output will be considered as a hydraulic motor power source and stepmotor of compound feed system hydraulic feeding, although they could not be located, but with high output force, pre-language educatiuon, so that the feed motion can accurately that productivity has risen considerably.