The invention belongs to the technical field of pile foundation projects, and relates to an indoor model pile body fiber grating and pile-soil interface sensor arrangement device. a first groove, a second groove and a third groove are evenly formed in the outer lateral wall of a model pile; fiber grating sensors which are connected in series through an armored cable are arranged in the first groove; silicon piezoresistive soil pressure sensors which are connected in series through the armored cable and silicon piezoresistive pore water pressure sensors which are connected in series through a shielding waterproof lead are arranged inside the second groove and the third groove respectively; an opening is formed in the bottom part of the model pile; the silicon piezoresistive soil pressure sensors of which the test heads are downward are arranged in the opening; and a fourth groove is formed between the opening and the second groove. The indoor model pile body fiber grating and pile-soil interface sensor arrangement device is simple in structure, simple and convenient to operate, efficient and fast, and can be widely applied when the pile body pressure and the pile-soil interface pressure are tested in an indoor model test; and the cost is saved.