In recent years, there are many studies concentrating on the syntactic comprehensive ability of patients with Broca's aphasia who are all native English speakers. Among them, the mechanism of how patients comprehend passive sentences is concerned by many researchers. Contrastively, there are few studies on how native Chinese speakers with Broca's aphasia comprehend passive sentences. Based on relative theories and studies, such as Trace Deletion Hypothesis (TDH), Double Dependency Hypothesis (DDH) and the eye-tracking experiment aiming at English agrammatic patients, this paper focuses on one type of the Chinese passive sentence, sentence passive bei, raises a proposal that constructs a research scheme for Chinese agrammatic patients, puts forward a series of hypothetical results, and based on current solid theories, carries out various explanations for possible results.