The invention discloses a soil slope multi-field coupling simulation testing device which comprises a model box body, a counter force loading device, an electric heating system, an artificial rainfall system and a temperature and strain measurement acquisition system. The model box body is in a cuboid shape and provided with five closed faces and a top opening. The box body structure is formed by a steel structure through pouring and welding. The front side of the box body is welded into a whole in a grid shape through steel bars. A piece of tempered glass is arranged on the inner side of the grid. Slope models are stacked in the box body. The counter force loading device is installed on the upper portion of the testing device. The electric heating system is disposed at the bottom of the testing device. The artificial rainfall system is arranged above the testing device. The soil slope multi-field coupling simulation testing device is an indoor model device which aims at estimating soil slope stability under the multi-field effect, and can analyze stability of slopes under the influence of various factors.