我国运用客车冬季客室内温度偏低的现象极为严重。本文从车辆设计计算、隔热性能、运用管理等三个方面分析了导致客室内温度偏低的原因。同时对设计计算中各参数的选取、车辆隔热结构的薄弱环节及其改进、采暖设备运用管理中存在的问题及解决方法等提出了一些见解。 China’s use of passenger cars winter indoor temperature is very low. This article analyzes the causes of the low temperature inside the passenger compartment from three aspects of vehicle design and calculation, heat insulation performance and operation management. At the same time, some suggestions on the selection of parameters in the design calculation, the weak links of the vehicle insulation structure and its improvement, the problems existing in the operation and management of the heating equipment and the solutions are put forward.