The invention discloses a construction method of a gravel grouting pile adjacent to a business line. A long spiral drilling machine is adopted for construction, the process of slip casting by pressureis improved, and the problem that potential safety hazards such as differential settlement and hole collapse occur due to the fact that traditional gravel grouting pile has great disturbance to the surrounding roadbed in the construction process is solved. The construction method has small disturbance to the surrounding roadbed, the overall construction efficiency and safety factor are improved,the purpose of widening roadbed sides is achieved, the stability and integrity of the structure are ensured, the durability of the roadbed is improved, and the design requirements of new lines are met. Meanwhile, the need of reasonable arrangement of the site is well met, the safety index of the business line is reduced, the construction efficiency is greatly improved, and the construction cost issaved.