The invention provides a directional drilling process simulation experiment device and belongs to the field of petroleum engineering. According to the directional drilling process simulation experimental device, study targets such as the drill column static buckling experiment study under the working condition of actual drilling, the drill column dynamics behavior experiment study, the study on influence regularity of working condition parameters to the drilling trend, the drilling tool combination performance evaluation and optimization study and the novel guide tool design and function characteristic study can be completed, and the purpose of drilling process simulation and study under the combined action of downhole factors is realized. The directional drilling process simulation experiment device comprises a base; a control shaft is rotatably erected on the base and connected with an adjustment face plate in a swinging mode; the control shaft and a swinging shaft of the adjustment face plate are arranged oppositely; a swinging unit is arranged in the middle of the adjusting face plate and comprises a swinging track used for controlling the swinging angle of the adjusting face plate; a swinging control part which can be matched with the swinging track is arranged in the swinging track; and the swinging control part is fixed on the control shaft.