Abstract: The evaluation relationship based on phrase structure grammar（PSG） is identified in three steps：first syntactically analyze the sentence to be evaluated；then extract evaluation expression and the evaluation targeted candidate，and judge whether the syntactic path between the expression and the candidate is grammatical；finally divide the corresponding relationship into three groups：1. candidatesubject，expression-predicate；2. candidate-object，expression-posterior verb；3. expression-modifier，candidate-central statement. In the test analyzing customers’comment on JD’s cell phones，the accuracy rate of this method is 88.02%，recall rate 84.32 % ，and the F1 value 55.82%. The result proves this method is effective. The introduction of the comparatively mature phrase structure grammar in the identification of evaluation relationship can effectively improve the system’s performance and enhance its advantage in fault tolerance，boundary identification of candidate，avoiding rule conflict，and recognizing distant pairing.

Key words: evaluation relationship, PSG, evaluation analysis, Chinese information processing, computational linguistics