The invention relates to a low-temperature cement adhesive for cementing insulators. The adhesive is composed of the following materials, in percentage by mass, 45-50% of cement, 4-6% of a temperature regulating agent, 1-2% of a freezing-point regulating agent, 4.5-5% of an expanding agent, 0.2-0.3% of an early-strength-type super plasticizer, 0.01-0.02% of an antifoaming agent, and 40-45 % of yellow sand. The early strength of the low-temperature cement adhesive for cementing the insulators develops rapidly under low-temperature conditions, and the high-temperature maintenance time can be shortened or even the high-temperature maintenance is canceled, thus production efficiency of the insulators is greatly improved.