The present study seeks to identify and prioritize knowledge needs and requirements for designing a knowledge - based database in capital financing companies. This study is a descriptive and survey study. Statistical research population includes managers, experts and employees in capital financing companies, that a number of 250 individuals were selected by using census and simple random sampling methods. Research instruments is a standard questionnaires. Data analysis were conducted by using SPSS software. Studying research results indicated that 9 factors of technical, knowledge and human infrastructures capacity, organizational structures and processes capacity, services of capital financing companies, technology, knowledge management capacity, marketing, Security and political stability, cultural capacity and change management capacity are considered as knowledge requirements and needs in capital financing companies and should be included in knowledge databases of these companies