Abstract: Modular construction is used for AP1000 nuclear island of the third generation of nuclear power station， which provides great economic benefit． The important load lifting becomes one of the key techniques． The necessity of the important load lifting simulation based on BIM technique is pointed out，which is for the problems exist during the AP1000 nuclear island lifting，such as lifting planning，lifting animation and simulation and collision detection． The BIM-based lifting animation and simulation platform is put forward after the brief introduction of BIM． The definition method of the crane BIM model is shown． And the way to simulate with the BIM model based on 3DS Max software and do structural analysis based on ANSYS software is introduced.