Based on the theory of technological trajectory and preexisting researches,this paper firstly deduces the stage where the three technological trajectories of medical and pharmaceutical products industry separately stays and the stage characteristics of the growth in medical companies.

this paper introduces the DEA method into the evaluation of M & A performance in the companies, by taking the listing medical companies as example, makes a whole evaluation on the companies performance before and after M & A.

Research on the Evaluation Model of Listed Pharmaceutical Company s Value and Its Application-from the Perspective of Value-Driven;