The power grid security early warning technology is important to ensure the security and stability of the power grid. Firstly, the development situation of analytical power grid security early warning technologies is introduced, and some engineering problems are discussed briefly. Secondly, the framework of the power grid intelligent security early pre-warning technology based on big simulation data is proposed, and the feasibility and advantages of hybrid model-driven and data-driven method are dicussed. At last, the tentative application in Guangdong Power Grid has a good effect.