The present study employs “online grammaticality judgment task”on E-Prime programme to investigate the cognitive processing of second language high frequency non-idiomatic formulaic sequences on 30 Chinese and 30 Danish EFL learners． The findings of both groups support the holistic hypothesis of formulaic sequences． It was found: ( 1) Second language learners in the Chinese and Danish EFL contexts also have the processing advantages of English formulas as natives． ( 2) Data from Chinese and Danish parallel groups indicate that when L1 is closer to L2 and the needs for communication in L2 is stronger， the reaction time of L2 is faster and the correct rate is higher． ( 3) From high frequency to low frequency of the stimuli， the reaction time form a continuum from fast to slow， providing evidences for frequency effect．