The invention discloses a pile fixing system suitable for a lifting platform, and belongs to the field of lifting platforms. The pile fixing system comprises pile fixing devices, each pile fixing device comprises a locating block, a pile fixing slide block and a telescopic oil cylinder; each locating block is fixedly mounted on a platform main body of the lifting platform; each locating block and the pile leg of the lifting platform are arranged at an interval; each pile fixing slide block is slidably arranged on the platform main body; each pile fixing slide block is provided with a matching surface matched with an oblique plane of each locating block and a friction surface matched with a peripheral wall of the pile leg; one end of the telescopic oil cylinder is fixedly mounted on the platform main body; the other end of the telescopic oil cylinder is connected to the pile fixing slide block; the telescopic oil cylinder is used for driving each pile fixing slide block to slide between a first position and a second position along the corresponding oblique plane; when each pile fixing slide block is located in the first position, the friction surface and the peripheral wall of the pile leg are arranged at an interval; and when each pile fixing slide block is located in the second position, the friction surface abuts against the peripheral wall of the pile leg. The pile fixing system saves manpower.