近年來，英語學習在台灣已蔚為一股風潮。為使孩子日後更具國際競爭力，許多家長在幼兒學前教育時段，即紛紛選擇全美語幼稚園或雙語幼稚園就讀，但在許多幼兒教育的相關研究發現，幼兒階段學習外語，易因語言的隔閡產生偏食學習，也會造成幼兒對文化認同的危機，且使幼兒表達與思考能力受影響，導致就學後產生學習挫折與障礙。 本研究以臺北縣新莊市某國小三年級為研究對象，採問卷調查法蒐集資料，並以最小平方估計式模型（Ordinary Least Square）的估計，探究學齡前雙語教育對國小低年級學童學習成就的影響，及學童在不同性別、家庭子女數、有無兄姐、是否與父母同住、家庭所得及家庭社經地位（SES）等情形下與學童低年級學習成就之相關程度。實證結果發現，學童學齡前雙語教育經驗對學習一年後及二年後之學習成就（包含總成績、國語、英語及數學成績）除英語成績具有顯著影響外，其餘影響效果皆不顯著；在性別差異上，女生的學習成就均高於男生；家庭子女數多寡與學習成就呈顯著負影響；學童有無兄姐及是否與父母同住對學習成就的影響，在學習一年後有顯著影響，對學習二年後之學習成就影響則不顯著；家庭所得對學習成就影響較不顯著；另外，家庭社經地位對學習成就則呈現顯著正面影響。 / English learning has been gaining popularity recently. In order to make children more competitive internationally, many parents choose English immersion or bilingual kindergartens when their kids are in preschool ages. But according to many researches of preschool education, when preschool children learn English, it may cause them to pick what they like to learn because of the gap in languages, it may cause a crisis in children for identifying their cultures. It may affect their skills of expression and deliberation, and cause them to feel frustrated and hindered when learning. This research uses the 3rd grade students of an elementary school in Sinjhuang City of Taipei County for subjects, uses questionnaires to collect information, adopts the estimation of Ordinary Least Square, investigates the effects of preschool bilingual education for lower-grade students’ learning achievements in elementary schools, and compares the students’ relevant degrees with different genders, family members, whether having brothers and sisters, living with their parents or not, and their parents’ income and socioeconomic status. It proves that the experiences in preschool bilingual education for the learning achievements after having learned for one or two years, including their overall scores, and scores of Chinese, English and math. It turns out to be positive affection, but besides English scores, the affections are not obvious. In gender difference, girls’ learning achievements are better than boys. The numbers of their family members for learning achievements turn out to be negative affection. It is an obvious positive affection after having learned for one year whether the students have brothers and sisters or live with their parents or not, but having learned for two years and the parents’ income do not affect the learning achievements much. Their parents’ socioeconomic positions turn out to be positive affection, too.