Abstract: After analyzing the solution model of 3-RPR paralled mechanism,a new method is presented,which can find all solutions to mechanism synthesis and it is based on LINGO11.0 software.A solution is found with LINGO11.0,and the solution is used as a restriction.Then,to run the program again,the other one solution is found and so on.At last,all solutions are found.The problem of the 3-RPR planar parallel mechanism is solved by this method.This provides a simple realization method for mechanics design.

Key words: parallel mechanism, 6R-III grade group, 3-RPR mechanism, LINGO11.0 Software