Agricultural investment legal system is the support and assurance in economic globalization,internationalized development of agriculture,agricultural modernization,industry supporting agriculture,balancing urban and rural development and construction of new rural areas.Currently,many legal problems exist in agricultural investment of China,such as unclear responsibility among subjects,lack of management efficiency and lack of risk prevention.A complete system can be formed to safeguard the function of agricultural investment through perfecting the legal system of agricultural investment subjects,legal system of management,legal system of supervision,legal system of liability and legal system of resolving disputes.