The guarantee of enterprise's investment mainly includes the following aspects:

1. Financing planning: enterprises need to make financing planning first, and make clear the demand and source of funds. This includes internal funds, external financing and other ways to ensure that enterprises have enough funds for the operation of the research institute and project implementation.

2. financial management: enterprises need to establish an effective financial management system to rationally allocate and use funds. This includes budget management, cost control, fund supervision and other measures to ensure that the invested funds can be effectively used, and to evaluate the benefits generated by the investment.

3. Internal resource integration: Enterprises can optimize the utilization efficiency of funds by integrating internal resources. This includes coordinating the cooperation between different departments of the enterprise and making use of existing human and material resources to ensure that the investment of the enterprise can be maximized.

4. Risk management: Enterprises need to identify and manage risks in the investment process. This includes market risk, technological risk, competitive risk, etc. Enterprises can reduce the risks faced by investment and ensure the safety and stability of investment through risk assessment and control measures.

5. Policy support: Enterprises can seek the support of the government and relevant institutions to obtain policy support and financial subsidies. This includes applying for scientific research project funding, participating in government guidance funds, etc., and reducing the risk and cost of enterprise investment through policy support.

Based on the above measures, the enterprise can effectively guarantee the capital investment and ensure the normal operation of the research institute and the smooth implementation of the project.