Linguists and Muslim jurists have depended heavily on the Arabic Language in their researches about Islamic legislation. Their writings show a deep relationship between Islamic commandments and importance of Arabic language, because the Arabic language is the true method of understanding the words of Holy Quran which is the first reference in deriving Islamic Commandments. Without learning and understanding the Arabic Language it is impossible to get knowledge of Islamic legislation, therefore, the Muslim has started to teach and learn the Arabic Language. The jurists have made it the basic condition to derive the Islamic Commandments for interpretation. The Companions of Holy Prophet (PBUH) and their followers have struggled for the interpretation of Holy Quran as linguistic explanation. The scholars have compiled too many books on the interconnection between Shariah and Arabic Language and extract the jurisprudence branches on the base of Arabic Language. This research will present the importance of Arabic Language in the light of Quran, Sunnah and conduct of Companions and Imams. In this research the importance and necessity of Arabic Language has been included according to the opinion of jurists and imams for interpreters and Muftis. This study will strengthen the relationship between Arabic Language and Islamic Commandments and it will increase the passion to learn the Arabic Language. The first chapter is about the importance of Arabic Language and its relation with the Islamic commandments, The second chapter is about of Arabic letters in deriving Islamic commandments from the Qur’anic Ayaat, The third chapter is about the role of nouns in deriving the Islamic commandments from the Ayaat, The fourth chapter discusses the role of various verbs in deriving the Islamic commandments from the Qur’anic Ayaat, The last chapter is devoted to the miscellaneous words, terms, and linguistic expressions of the Arabic language which play a vital role in deriving the Islamic commandments from the Qur''anic ayaat.