The utility model provides a screw damping vibration isolator which but, being elastic compression between the first end of and the second end, it includes: the screw lasso, it is regarded as or connects first end, provides the elastic support who treats damping structure thing, and it has the internal thread, barrel in the elasticity, its as or connect the second end, locate basic thing, its have the screw rod heighten with the elastic component of elastic support in its below, the screw rod is heightened the piece and is had an external screw thread that closes with the internal thread spiral shell of screw lasso, through rotatory screw rod heighten or rotatory elasticity in the barrel adjust elasticity in the spiral shell of barrel in the screw lasso close the degree of depth, realization screw damping vibration isolator treats the high steplessly adjust that shores of damping structure thing. The utility model discloses a screw damping vibration isolator can steplessly increase, and its jacking is quick simple, convenient operation, and the volume is littleer, the damping effect is better. Subduing of ground vibrations that the vibration that can be used to to cause including track traffic, vibratory equipment and other equipment and earthquake, construction (if blasting), vibration and other equipment cause.