An electric wheelchair is provided. The electric wheelchair comprises a chassis (08), a walking mechanism, a seat, a seat level adjustment mechanism and a seat gravity-center adjustment mechanism. Two sets of rubber tracks (09) are respectively arranged on the left and right sides of the electric wheelchair, forming four independent suspension walking mechanisms. The two sets of rubber tracks (09) keep an angle of about 160°at no-load mode, and keep an angle of about 180°at full-load mode. The electric wheelchair can walk on a flat road, climb uphill and go downhill freely. The electric wheelchair can go upstairs and downstairs without reversing action.