Safety investment decision optimization method based on coupling model

The invention discloses a safety investment decision optimization method based on a coupling model, which solves the problem of helping enterprises to reasonably allocate safety resources and better control accidents, and mainly comprises the following steps: S1, establishing an index system: carrying out index division on safety investment and accident control, dividing safety investment and accidents into a target layer, a first-level index and a second-level index from top to bottom; s2, data collection and preprocessing: collecting data according to the index system constructed in S1; safety investment data is stripped from financial data of an enterprise, and accident data is sorted from production process records and accident investigation reports. Carrying out dimensionless processing on the data and calculating a weight; s3, establishing a coupling model, setting coupling parameters, and calculating a safety input and accident control system coupling result; s4, establishing a grey correlation analysi