Underground continuous wall construction method of city-across pipeline

The invention provides an inter-city pipeline underground continuous wall construction method. Through the adoption of the method in the construction, the integrity of the underground continuous wall is good, the verticality is high, the anti-penetration performance is good, the wall body can be successfully sealed, the pollution to the surrounding environment is less, and the underground structures can be better protected. The inter-city pipeline underground continuous wall construction method comprises the procedures: the pipeline is dug, examined and reinforced; the wall guiding construction is performed; the slurry mortar is prepared; the groove building construction is performed; after the groove is milled, a steel truss is hanged and fixed on the groove; a reinforcement cage is processed and a pulley system is installed; the reinforcement cage is hanged on one side wall of the groove, and arranged on the steel truss; through the steel truss and the pulley system, the reinforcement cage is slid to the lower groove section of the pipeline; other reinforcement cages are hanged in; and concrete is poured into the pipe.