The invention discloses a hand-steered swing body-building bike. The bike includes a handlebar, a deflecting bar, a pedal, a front-wheel component and two rear-wheel components, the upper end of the deflecting bar is connected to the middle part of the handlebar, the lower end of the deflecting bar is connected with the front-wheel component, the front-wheel component is in pivoted joint with thefront end of the pedal, and the two rear-wheel components are connected to the rear end of the pedal, wherein each rear-wheel component includes a rear-wheel carrier, and a rear-wheel body, the rear-wheel body is in pivoted joint on the rear-wheel carrier, an universal wheel is formed, and the rear-wheel carrier is at a certain acute angle psi relative to the forward direction of the body and is inclined downwardly to be connected to the pedal. Because the rear-wheel carriers are at the certain acute angle psi relative to the forward direction of the body and are inclined downwardly to be connected to the pedal, the rear-wheel components are the universal wheels, pressure generated by a human body on the body has a component force along the forward direction of the body, the component force cooperates with twisting of the human body, and the component force of the pressure along the forward direction of the body is higher than frictional force of earth on the wheel bodies, thereby so that the body goes forward, the purpose of body-building is achieved, operation is flexible, safety performance is good, and the bike can be used indoors and in other elegance places.