Attracting investment capital of enterprises into industrial parks has become an important task for countries when building and developing industrial parks to meet the economic goals of the country. To attract enterprises' investment capital into industrial parks, it is important to study what the enterprises need and whether or not they have met the needs of the enterprises. This examination was designed to analyze the factors affecting the investment decisions of enterprises in industrial parks in Vietnam whereby serving as the basis for proposing recommendations to improve the efficiency of attracting investment capital of enterprises in industrial parks in Vietnam. Research findings indicate that some factors influencing enterprises' investment decisions in industrial parks include: Local institutions, human resources, local advantages and infrastructure. Based on that analysis, the study proposes several recommendations to attract investment in industrial parks in Vietnam.