Recent researches in cognitive linguistics suggest that enhancing awareness of conceptual metaphors embedded in the individual words may help second language students to learn idioms. This study examined whether enhancing awareness of orientational metaphors of particles facilitates acquisition of phrasal verbs by Chinese English as a foreign language(EFL) students. The students in the control group learned a set of phrasal verbs through traditional instruction, whereas those in the experimental group received the same input through a cognitive linguistic approach. The students in both groups were then asked to fill in the missing adverbial particles of the phrasal verbs. Results showed that the students in the experimental group performed significantly better than those in the control group, implying that when the target idioms are not stored as a unit in learners’ mental lexicon, learners who are aware of conceptual metaphors may rely on metaphorical thought to produce an appropriate adverbial particle. This highlights the implications that EFL learners need to be explicitly taught about the notion of orientational metaphors before they can actively comprehend and produce appropriate phrasal verbs. Recent researches in cognitive linguistics suggest that enhancing awareness of conceptual metaphors embedded in the individual words may help second language students to learn idioms. This study helps whether awareness awareness of orientational metaphors of particles facilitates acquisition of phrasal verbs by Chinese English as a foreign language ( The students in the control group learned a set of phrasal verbs through traditional instruction, but those in the experimental group received the same input through a cognitive linguistic approach. The students in the control group learned a set of phrasal verbs through traditional instruction, but those in the experimental groups received then same input through a cognitive linguistic approach. particles of the phrasal verbs. Results showed that the students in the experimental group performed significantly better than those in the control group, implying that when the target idioms are not stored as a unit in learners’ mental lexicon, learners who are aware of conceptual metaphors may rely on metaphorical thought to produce an appropriate This highlights the implications that the EFL learners need to be diagnosed about the notion of the notion of orientational metaphors before they can be comprehend and produce appropriate phrasal verbs.