The invention discloses a two-way swing body slimmer, and the two-way swing body slimmer comprises a lower bracket used as the base; an upper bracket; two lateral movement mechanisms respectively jointed to the middle parts of the front side and rear side of the upper bracket and the middle parts of the front side and rear side of the lower bracket, relative to the upper bracket and the lower bracket, the lateral movement mechanisms rotate in the vertical plane of the front side of the upper bracket; two driving devices respectively provided with an eccentric gear, one eccentric gear is jointed to the left section or the right section of the upper bracket while the other eccentric gear is jointed to the middle section of the upper bracket. Two driving devices work alternately. The two-way swing body slimmer can realize two-way swing driving mode of body slimmer.