介绍了聚氨酯直埋管的特点、加工及现场施工工艺，分析了采用直埋管与采用砌筑暖沟岩棉保温两种方法所用的投资及工期，认为在达到同样保温效果的前提下，采用直埋管可缩短工期、减少材料浪费、减少岩棉对人体危害，且工艺简单，施工方便。 Introduced the characteristics, processing and on-site construction technology of polyurethane straight buried pipe, and analyzed the investment and construction period used for the two methods of direct insulation and rock wool insulation using bricklaying. It is considered that under the premise of achieving the same insulation effect, Directly-buried pipe can shorten the construction period, reduce material waste, and reduce rock wool’s harm to human body. The process is simple and the construction is convenient.