Linear guide rail pair with good dustproof effect

The utility model discloses a linear guide rail pair with a good dustproof effect, which comprises a linear guide rail, a sliding block, an upper sealing baffle plate, a ball, a lower sealing baffle plate and a sealing rubber strip, the sealing rubber strip is arranged on the lower sealing baffle plate, and a square hollow part is arranged on the sealing rubber strip, so that the sealing rubber strip can be shrunk and extruded in the assembling process, and is convenient to assemble; in the actual use process, the square hollow part arranged on the sealing rubber strip can be flexibly adjusted according to the assembling gap and the running gap between the sliding block and the linear guide rail in the sliding block assembling and running process, it is guaranteed that the sealing rubber strip is tightly attached to the linear guide rail all the time, and external dust cannot enter a linear guide rail pair from the bottom of the sliding block; friction degree of the linear guide rail pair is reduced, and seal