The invention discloses an underwater geotechnical cloth lapping and pavement method and belongs to the coastal engineering construction technology. Due to the complexity of a soft foundation and the imbalanced bearing force of the foundation, the underwater geotechnical cloth always causes ballast drifting, and especially, the lapped position of two pieces of geotechnical cloth always has disjoint phenomenon; the potential hazards on quality is generated as the mentioned problems cannot be effectively solved in the sequent project. The pavement method provided by the invention comprises a GPS positioning method, an industrial control monitor real-time marking method, a barbed hook steel rope method and a gravel bag method; as the gravel bags are placed accurately, the floating, curling and drifting of the geotechnical cloth are effectively prevented, the underwater geotechnical cloth is paved smoothly and without creases, the edges of the cloth are hooked and linked to one with one another, and the working efficiency and the pavement quality are improved; the difficult problem of lapping the underwater geotechnical cloth is well solved, and the method has the characteristics that the positioning is accurate, the errors are small, the speed is high, and the efficiency is high.