The invention provides a high-voltage electric porcelain cementing technique, which is formed by three parts, that is, cementing preparation, cementing and cementing maintenance and hardening. The cementing preparation process is characterized by carrying out cleaning processing on porcelain members and accessories, and applying a buffer protection coating onto each porcelain member and each accessory; the cementing process is characterized by carrying out preparation and use of cement adhesive, carrying out cementing positioning, and pouring the cement adhesive into the insulator porcelain members and the accessories to realize cementing; and the cementing maintenance and hardening process is characterized by carrying out early-stage maintenance and hardening treatment, and post-hardeningtreatment. The technique improves structure temperature stress state due to difference of thermal expansion coefficients among porcelain, metal and the cement adhesive, can relieve the impact of abnormal stress impact on an insulator, can enable the cement adhesive to have high fluidity, facilitates cementing of workers, improves efficiency and quality of the cementing work, meets requirement forhigh strength in cementing of a large-scale porcelain sleeve and reduces time in test, package and factory delivery after cementing of the porcelain sleeve.