The invention provides a heat pipe and phase-change material-based low-temperature power battery heat management system, which comprises batteries, a phase-change material, heat pipes and a heat preservation layer coating the whole system, wherein the batteries are put into an independent battery box; the phase-change material is put into an independent phase-change material box; and each battery in the battery box is at least attached to one end of one heat pipe and the other end of the heat pipe extends into the phase-change material box and is in contact with the phase-change material. According to the system, heat generated by the power batteries during operation is transferred by using the heat pipes, the heat is stored by using the phase-change material and the heat is transmitted when the temperature of each battery is reduced, so that the target of heat preservation on the batteries is achieved; any energy does not need to be consumed in the whole process; excessive heat released by the batteries in the operation process is utilized; the condition that the battery box is always in an appropriate temperature range at a low temperature can be well ensured; the heat preservation requirements of the batteries at the low temperature are met; and the heat pipe and phase-change material-based low-temperature power battery heat management system is a high-efficiency and energy-saving heat management scheme.