Abstract: This paper aims to investigate the retarded Liénard-type equation
x＋ f₁（ x）x˙ + f_2（ x）x˙（ t  - τ) + f_3（ x）x˙2 + φ（ x）＋ g（ x（ t - τ)) = 0,
where τis a nonnegative constant ,f₁ ,f₂ ,f₃ ,φ and g are continuous functions on R．Using Liapunov functional method ,we establish a sufficient condition on the stability and boundedness of the solutions of above equation．This will generalize the main results of reference［2］.
Key words：retarded Liénard-type equation；stability ；boundedness
CLC number：O175．21    

Key words: retarded Liénard-type equation, stability , boundedness