Disclosed is a PCC pile apparatus for combined cooling, heat and power generation, comprising a closed PCC pile (1), a heat exchange pipe (2) arranged inside the closed PCC pile (1), a heat exchange device (11) and a temperature-difference power generation system. The flow rate of liquid in the heat exchange pipe (2) is controlled by a water pump I (10) and a valve (9) connected to same so as to realize heat exchange between the heat exchange pipe (2), heat exchange liquid and soil mass, and liquid in the heat exchange pipe (2) after the heat exchange is connected to the upper heat exchange device (11) for air conditioning, thereby forming an air-conditioning system. The temperature-difference power generation system comprises a semiconductor temperature-difference power generation device I (3) arranged on an inner side wall of the closed PCC pile (1) and semiconductor temperature-difference power generation devices II (4) and III (28) arranged on an outer side wall of the heat exchange pipe, respectively forming a shallow-geothermal-energy temperature-difference power generation system with a DC/DC converter (5), a storage battery (6), a water pump II (23) and conducting wires (8), so as to use a temperature difference between liquid in the heat transfer pipe (2) and the soil mass to generate power for a building above. The system effectively realizes the combined utilization of the PCC piles (1) in terms of mechanics, thermotics and electricity, and also realizes the on-demand and time-interleaved multi-purpose utilization of shallow geothermal energy in an effective manner, thereby improving energy utilization efficiency.