As a maritime nation, Malaysia has developed its own maritime capabilities in order to safeguard its national interest over the sea especially in Exclusive economic zone (EEZ). Any activity that could threaten the strength of the economy can be regarded as betray national interests and actions must be taken to prevent it vociferously. South China Sea (SCS) is increasingly important not only in terms of defence strategy even in economic development of the country. It is used by the warships and merchant ships.  This SCS is rich with natural resources such as oil and fishery. These natural resources will invite many foreign countries to come and do illegal activity in Malaysia’s EEZ. Zone (EEZ) together with its impact towards Malaysian maritime security. This research was conducted to analyze the foreign activities in Malaysia’s Economy Exclusive Zone (EEZ) together with its impact towards Malaysian maritime security. Where there are many foreign activities occurs in the waters of our country which indirectly affect the economy and national security. Therefore, the Security Forces should work together with the relevant agencies to safeguard the security of our country's waters from activities that could be harmful to our country's waters. Utilizing the qualitative approach, this research sought the foreign activities in Malaysia’s EEZ and how Malaysia response on this issue. The findings of this research are 1) Non – traditional security issues occur in Malaysia EEZ recently, 2) Malaysia has cooperation with several agencies to protect EEZ’s sovereignty and 3) Malaysia increasing the cooperation with other countries to enhance the maritime security in the EEZ boundaries.