Abstract：The commonness of the disaster in the eco-environment pattern is taken as this paper¢s main exploring background. This paper¢s researching focus is to construct the chain-styled systemic theory of the disaster on the basis of considering all disasters. The materiality of the disaster rule is covered，because the man activity is out of the nature state. The chain-styled theoretic models，such as bursting apart and slippage chain，periodicity repetition chain，and branch-haulm drainage area chain，are proposed. The parameters in these models are divided into the chain-styled phases of the disaster by the degree and mechanism of the fragmentation force. To prevent the disaster spreading from the headstream，clutching at the longest process of the inchoate gestation phase，the mode and mechanism of the mitigation disaster by cutting the disaster chain in the headstream are founded. With the coupled process parameters picked up in bursting apart and slippage rock demonstration engineering，and using the nesting model of the mechanics behavior and transmission between the energy and matter with the different space-time scales，the functions of simulating the disaster after the disaster and of concentrating the disaster process are opened up by the video dynamic deduction system to get the high-point parameters of the mitigation disaster in the inchoate gestation phase. This project forms the new systemic theory pattern of the disaster chain，and initiates the system information of the chain-styled disaster in the eco-environment.
