The invention relates to a gathering and transportation pipeline shutdown experimental simulation and radial temperature field testing device. The gathering and transportation pipeline shutdown experimental simulation and radial temperature field testing device comprises an overhead pipeline radial temperature field testing device, a buried pipeline radial temperature field testing device, a screw pump, an oil storage tank, a water storage tank and an oil-water separator, the overhead pipeline radial temperature field testing device and the buried pipeline radial temperature field testing device are connected in parallel for forming a test section, after being merged, an outlet pipe of the oil storage tank and an outlet pipe of the water storage tank are connected to the starting end of the test section, outlet valves are installed on the outlet pipe of the oil storage tank and the outlet pipe of the water storage tank respectively, the tail end of the test section is connected with the screw pump, the screw pump is connected with the oil-water separator, and the oil-water separator is connected with the oil storage tank and the water storage tank. By means of the device, the buried hot oil pipeline shutdown process can be simulated, and the pipeline shutdown temperature field testing of crude oil under different shutdown working conditions is achieved.