The common methods of hoisting and lengthening the spud leg of jack-up platform in China at present are briefly introduced. A hoisting scheme of the platform spud leg based on lever principle is proposed. The design and application of the scheme and the tooling used are also introduced. The problem that the length of the spud leg exceeds the height of the gantry crane in the dock and the conventional hoisting scheme can not be lifted is solved, the integrity of the platform before launching is ensured, the cost of leasing a large floating crane after launching is saved, and the construction cost is saved.