The invention discloses a vehicle tire load capability monitoring method based on a combined sensor; the method comprises the following steps: using the combined sensor to sense a suspension three dimensional acceleration and a vehicle and wheel three dimensional acceleration, a three dimensional angular velocity and a three dimensional terrestrial magnetism intensity, and tire pressure and temperature; using the vehicle and wheel three dimensional parameters to obtain a vehicle roll angle, a pitch angle and a wheel vertical acceleration through an attitude algorithm; using the vehicle roll angle, the pitch angle, and the vehicle axial acceleration, lateral acceleration and vertical acceleration parameters to obtain the total mass on the wheel reeds through a dynamic load algorithm; usingthe suspension vertical acceleration and the wheel vertical acceleration parameters to obtain the total mass under the wheel reeds through the dynamic load algorithm; using the total mass parameters on the wheel reeds and below the wheel reeds to obtain the wheel dynamic load through the dynamic load algorithm; using the wheel dynamic load and the tire pressure and temperature parameters to obtainthe tire load capability; fusing the wheel dynamic load, the tire pressure temperature and tire load capability data so as to obtain the tire load capability changing trends.