Constraint collision evaluation method based on vehicle passive safety

The invention discloses a constraint collision evaluation method based on vehicle passive safety, belongs to the technical field of safety air bag detection, and specifically comprises the following steps: detecting a fault of a constraint protection unit by using a safety air bag fault detection unit; the ECU controller is used for controlling the safety air bag fault checking unit and receiving fault defect information, detected by the safety air bag fault checking unit, of the constraint protection unit; connecting the ECU controller with a mobile client, and establishing a fault grade evaluation library by using the mobile client; a defect number detection unit of the mobile client side is used for carrying out defect number statistics on faults and defects detected by the safety air bag fault detection unit; a grade evaluation unit of the mobile client is used for evaluating faults and defects detected by the safety air bag fault detection unit; a grade evaluation unit is used for carrying out grade matc