Antisliding piles are an important engineering structure used extensively in landslide prevention. Their durability influences their work lives. In a laboratory model experiment of a cantilevered antisliding pile under acidstress coupling, the pile body displacement variation is monitored continuously, and both concrete strength and neutralization depth are tested. The results indicate that the concrete strength decreases gradually under acidstress coupling, while the displacement increases continuously. The neutralization depth of the concrete in the antisliding pile is linear to the square of duration in acidstress coupling.