Automatic variable ratio mechanical bridge

The present invention discloses a variable ratio automatic mechanical bridge, comprising a plate body plug, the plug power connector and a ground member disposed on the plate body, a plurality of sets of plug insertion holes is provided on the plate body, the said connector body rear plate disposed connecting plate comprises a fixed end and a movable end, the movable end connected to a plurality of sets of insertion holes activity, measured with the means connected to the fixed end. Group integrated board insertion hole group provided on a plurality of ground posts conveniently be disposable multi-winding plug, the plug hole after each use of the terminal once a complete set of pluggable, does not require a plug a dial, improve work efficiency.