The field operation shows that the high voltage bushing is one of the components with high probability of failure in the power transformer accessory. Therefore

it is very important to carry out the assessment of its running status. In this paper

a subjective and objective fusion evaluation method based on the cuckoo algorithm optimization is proposed

and a running status evaluation system with gas content and maintenance times and other indicators is built. An example of 220 kV oil-paper bushing is also calculated. The evaluation of this method is more close to the real running status of the bushing

which has advantages such as comprehensive assessment

clear quantification and operability. It can provide reference for relevant researchers.