Objective To design a new kind of bi-plate for fixation of long bone comminuted fracture, and detect its mechanical properties. Methods We designed limited contact chute bolt compression bi-plate, and detected its mechanical properties by electrical methods, comparing with single plate and simple bolt bi-plate made by the same material and technology. Results The axial strength of limited contact chute bolt compression bi-plate was different from those of simple single plate and traditional bi-plate (P<0.01). There was no obvious difference with traditional bi-plate in anti-bending property, but obvious difference with single plate (P<0.01). It has low stress protection effect. Conclusion Limited contact chute bolt compression bi-plate has high strength and low stress protection effect. It becomes possible for early functional exercise and accelerated bone union procedure. It provides a new method for rigid internal fixation with low stress protection effect.