The invention discloses a pipe joint reinforcing method during suspension of a socket pipe. The method comprises the following steps: 1) excavating earth; 2) preparing a steel pipe, and operating thesteel pipe; 3) cleaning the outer wall of a pipeline needing to be suspended; 4) placing the steel pipe; 5) filling a filler between the steel pipe and the pipeline needing to be suspended; 6) buckling the pipeline needing to be suspended by using the steel pipe with a hole; 7) welding the upper and lower parts of the steel pipe wrapped on the pipeline needing to be suspended; 8) grouting the steel pipe through a grouting hole in the steel pipe with the hole so as to fill a gap between the steel pipe with the hole and the pipeline needing to be suspended; 9) curing the grouting materials in the steel pipe with the hole and the steel pipe without the hole; and 10) after the curing is finished, suspending the pipeline needing to be suspended. According to the method, the pipe joint and the pipeline form a whole by means of the support of the steel pipe, and meanwhile, the grouting materials are filled between the steel pipe and the pipeline, so that the phenomenon that the pipeline slides in the steel pipe is avoided, and the whole method is compact in step and easy to construct.