A multifunctional curved training device , comprising: a first main body , in an U shape, comprising a first middle portion and a first left branch and a first right branch respectively extending in the same direction from two ends of the first middle portion and parallel to each other, a first supporting bracket being provided between the first left branch and the first right branch , wherein the first supporting bracket comprises a first left supporting portion , a first right supporting portion and a first middle supporting portion , one end of the first left supporting portion is connected to the first left branch , one end of the first right supporting portion is connected to the first right branch , and one end of the first middle supporting portion is connected to the first middle portion ; a second main body , in an U shape, comprising a second middle portion and a second left branch and a second right branch respectively extending in a same direction from two ends of the second middle portion and parallel to each other, a second supporting bracket being provided between the second left branch and the second right branch ; a left elastic connecting member , arched in shape, the left elastic connecting member comprising a left spring and a left flexible sleeve enveloping an outer periphery of the left spring , two ends of the left elastic connecting members respectively being connected to the first left branch and the second left branch ; and a right elastic connecting member , arched in shape, the right elastic connecting member comprising a right spring and a right flexible sleeve enveloping an outer periphery of the right spring , two ends of the right elastic connecting member respectively being connected to the first right branch and the second right branch . a first main body , in an U shape, comprising a first middle portion and a first left branch and a first right branch respectively extending in the same direction from two ends of the first middle portion and parallel to each other, a first supporting bracket being provided between the first left branch and the first right branch , wherein the first supporting bracket comprises a first left supporting portion , a first right supporting portion and a first middle supporting portion , one end of the first left supporting portion is connected to the first left branch , one end of the first right supporting portion is connected to the first right branch , and one end of the first middle supporting portion is connected to the first middle portion ; a second main body , in an U shape, comprising a second middle portion and a second left branch and a second right branch respectively extending in a same direction from two ends of the second middle portion and parallel to each other, a second supporting bracket being provided between the second left branch and the second right branch ; a left elastic connecting member , arched in shape, the left elastic connecting member comprising a left spring and a left flexible sleeve enveloping an outer periphery of the left spring , two ends of the left elastic connecting members respectively being connected to the first left branch and the second left branch ; and a right elastic connecting member , arched in shape, the right elastic connecting member comprising a right spring and a right flexible sleeve enveloping an outer periphery of the right spring , two ends of the right elastic connecting member respectively being connected to the first right branch and the second right branch . <EOS>