This Study investigates English-speaking children’s acquisition of adjectival compounds based on the CHILDES(Child Language Data Exchange System) Corpus. The type and token frequencies and type per token ratios(TTRs) for adjectival compounds including compound nouns and compound adjectives were analyzed with reference to children’s age groups. The results showed that children started using adjectival compounds as early as at age 1;6 and that the developmental pattern of the adjectival compounds conformed to the general principles of word formation repertoire such as semantic transparency, formal simplicity and productivity.