Oil shock absorber

An oil shock absorber comprising a control assembly, a moving assembly, a damper assembly and a buffering spring, the buffering spring serving to provide elastic buffering force for respective components of the oil shock absorber;

• wherein:
• the control assembly includes a control shaft;
• the moving assembly includes a piston unit and control valve rod, the piston unit comprises a piston and a shaft which are disposed in the damper assembly, the piston and the shaft serve to control flow of oil, the control valve rod is disposed in the shaft and is moved by the control shaft of the control assembly, the piston unit is provided with guiding holes, the control valve rod is provided with holding portions corresponding to the guiding holes, the holding portions of the control valve rod are used to adjust opening size of the guiding holes, a motion of the shaft with respect to the control valve rod creates a valve which is opened and closed by displacement of the control valve rod, therefore, user can adjust buffering force of the oil shock absorber and turn the oil shock absorber on and off according real road condition, at any time.