Abstract: An experimental facility for the soil heat-moisture transfer process research based on buried pipe ground heat transfer is established.The variation characteristics of soil temperature and humidity distribution under different inlet fluid temperatures and different soil volumetric water content during the intermittent operation of ground source heat pump are investigated.The experiment results show that the increase of the inlet fluid temperature will maximize the soil temperature during the intermittent operation,but is not conducive to the restoration of soil temperature.The increase of soil volumetric water content is beneficial to the underground heat exchange and restoration of soil temperature to some extent.After the system being booted,there is a main rising temperature zone where the soil temperature increase in this zone exceeds 65%.The soil temperature after shutdown 18 h is basically restored to the initial temperature.After the system shutdown,the temperature and moisture content will have maximum shift under the influence of temperature and humidity gradient.The action radius of heat source on soil temperature and moisture content is about 280 mm and375 mm respectively.When the ratio of turn-on/turn-off is 1:2,the temperature and humidity can restore to lower than that of 1:1,so the reasonable setting of downtime is beneficial to the long-term effective operation of the unit.