Abstract: By means of principal components analysis，we analyze primary performance indicators of 18 enterprises，abstracting 4 principals including profit capability，operational capability，debts capability，business capability on which the performance evaluation model is established to evaluate the performance of 71 listed IT companies by using SPSS16.0.The analysis is hoped give some instructive advice for listed companies′ performance evaluation in other industries.

Key words: principal components analysis, performance evaluation, information technology industry, model establishment, listed companies