The invention provides a magnetically-shielded combined type friction-abrasion testing machine, which comprises a rack, a rotating mechanism, a horizontal adjusting platform, a reciprocating mechanism and a friction loading mechanism, wherein the rack consists of a bottom-layer platform, a middle-layer platform and a top-layer platform, and the middle-layer platform and the top-layer platform are positioned on the bottom-layer platform; the rotating mechanism is arranged on the middle-layer platform, the upper end of the rotating mechanism is connected with a rotating disc for placing samples, and a first magnetic shielding case is arranged at the outer peripheral side of the rotating disc; the horizontal adjusting platform is arranged on the middle-layer platform and arranged on one side of the rotating mechanism along a second direction, and the horizontal adjusting platform is provided with a turnplate seat capable of moving along the second direction; the reciprocating mechanism comprises a cylinder and a linear guide rail, the cylinder is arranged on the top-layer platform, a sample fixing seat is arranged on a slider of the linear guide rail, the linear guide rail and the horizontal adjusting platform are adjacent along a first direction, a second magnetic shielding case is arranged on the outer peripheral side of the linear guide rail, an extension rod of the cylinder is arranged on the second magnetic shielding case in a penetration manner and connected with the sample fixing seat and can drive the sample fixing seat to do reciprocating motion along the second direction; the friction loading mechanism consists of a support frame, a lifting platform and a loading assembly.