KPC electric electric flat car power supply way is: in the opening of a gutter on the side of the track, safety sliding contact line installed in the gutter, cooking with single cover plate with hinge fixed to the ground. Electric flat car running through the gutter frame device installed on the flat wagon, wave plate, turning device is with safety sliding contact line collector connect cable. Electric flat car automatically by the HouGaiBan back on the ground, can guarantee the trackless vehicles to go through. Gutter leaf sliding contact line electric flat car is not restricted by distance running.