The invention discloses a bus spacer cushion not slipping off easily. The bus spacer cushion comprises a bottom plate, a first mounting column, a second mounting column and telescopic rods; the firstmounting column and the second mounting column are perpendicularly mounted on the bottom plate; the first mounting column is sleeved with a first clamping plate; the first clamping plate can move up and down on the first mounting column; the second mounting column is sleeved with a second clamping plate; the second clamping plate can move up and down on the second mounting column; the first mounting column and the second mounting column are both sleeved with limiting nuts respectively; the limiting nuts are positioned at the bottoms of the first clamping plate and the second clamping plate; aventilating hole is formed in the bottom plate; and multiple telescopic rods are perpendicularly mounted on the bottom plate at the bottoms of the first clamping plate and the second clamping plate. By virtue of the structure, multiple buses can be isolated synchronously, so that downward slip-off risk of the first clamping plate and the second clamping plate is low, and stability is greatly improved.