Abstract: The present invention provides a modified shock absorber, which comprises a shock damping tube, an upper spring seat, a lower spring seat, a fixing ring, a resilient part, and a bearing seat. The resilient part comprises two springs of different spring constants. The bearing seat is used to connect the two springs up and down in series. Because the spring of larger spring constant restores to its original state more easily, and the spring of smaller spring constant absorbs energy more easily, higher effect of stability can be provided when they are connected in series. In other words, two springs of different spring constants connected in series are exploited to absorb energy in two steps so that a car will not easily skid and will have better stability when making a turn.