Underground waterproof engineering construction method

The invention relates to the technical field of waterproof engineering construction, in particular to an underground waterproof engineering construction method which comprises the following steps: S1, preparing a working area: before construction, ensuring that the working area is clean and safe, and providing enough space for constructors to operate and remove any obstacles and dirt; the intensity and direction of the external magnetic field can be adjusted in real time according to specific needs through the magnetofluid waterproof technology, so that the waterproof effect is accurately controlled, by changing the intensity and direction of the external magnetic field, constructors can adjust the viscosity of the magnetofluid and enhance or weaken the waterproof effect as needed, it can be ensured that the magnetofluid is accurately matched with specific conditions, and the construction efficiency is improved. Due to the fact that the viscosity of the magnetic fluid is accurately controlled, a water seepage