Photosensitive resin is a common material in 3D printing technology

which can be applied to the production of insulation support materials for high-voltage power equipment（such as surface grooves

different insulator shapes

etc.） to meet the needs of individual production. In order to analyze the surface flashover performance of photosensitive resin and the surface damage caused by continuous discharge

the flashover performance of photosensitive resin was compared with that of conventional insulator. Moreover

continuous discharge was carried out in the surface layer of photosensitive resin

and the flashover voltage

surface morphology

arc and emission spectrum were observed under different discharge times. The Weibull distribution was used to analyze the regulation and aging effects of c

ontinuous discharge. The experimental results show that the flashover voltage of photosensitive resin is slightly higher than that of polytetrafluoroethene and nylon. In the process of continuous discharge

burning-in and aging will coexist

but mainly in a form of aging. The surface morphology near cathode triple junction and the formation of fixed discharge erosion channel are important factors affecting the insulation performance. After continuous discharge

the insulator is decomposed and carbonized due to arc burning. With the increase of discharge times

the C

2

involved in the formation of discharge plasma channel decreases. The research results can provide references for material selection and design of high voltage vacuum solid insulation parts.