According to related theory of one-off compensator overburden preheating at home and abroad,the paper gives a calculation of the com-pensator spacing,preheating temperature and one-off compensator unilateral preheating elongation to DN1 000 prefabricated directly buried insu-lating pipe with different wall thickness. The results shows that,the theory of domestic regulations in engineering applications is more secure.%根据国内外一次性补偿器覆土预热的相关理论，对DN1000预制直埋保温管不同壁厚下，一次性补偿器间距、预热温度和一次性补偿器单侧预热伸长量进行了计算，结果表明，国内规程的相关理论在工程应用中更安全。
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