In order to promote hydraulic cylinder reliability research,especially its reliability test approach and novel test device research,the development of a new test bench with power recovery for the reliability research of hydraulic cylinder was introduced.With the new test bench,not only normal type test or predelivery test can be conducted,but also reliability test under normal or accelerated stress level can be conducted.In any reliability test,the user can compile and control the loading laws according to the real load spectrum of any cylinder product,the variable loading stresses include side load,oil temperature,pressure and velocity of the cylinder.The developed new test bench has advantages in obvious energy saving,high test precision,safety and reliability.