With the development of science and technology,large quantities of neologisms are created.Neologisms are the result of people’s conceptualization of new things based on their life experiences.Cognitive linguistics views that categorization of organisms and concrete objects are based on the prototype category.This paper takes 167 English Neologisms from Wordspy in2015 as the data for analysis and finds that these English Neologisms are characterized by family resemblances,degree of membership in category and boundary fuzziness from the view of prototype category theory.This study also has some implications for the research of English language teaching and learning. With the development of science and technology, large quantities of neologisms are created. Neologisms are the result of people’s conceptualization of new things based on their life experiences. Cognitive linguistics views that categorization of organisms and concrete objects are based on the prototype category. This paper takes 167 English Neologisms from Wordspy in2015 as the data for analysis and finds that these English Neologisms are characterized by family resemblances, degree of membership in category and boundary fuzziness from the view of prototype category.This study also has some implications for the research of English language teaching and learning.