The invention relates to a construction method for penetrating an existing pipeline below a super shallow buried tunnel shield. The construction method is characterized by including: constructing according to local settlement control standards, pre-penetrating experiment grouting parameters and construction tunneling parameters, namely reinforcing the ground surface of the existing pipeline, arranging monitoring point locations, and conducting a pre-penetrating pipeline construction experiment, wherein the pre-penetrating experiment is conducted in two steps, including step 1, conducting the pre-penetrating experiment when a notch ring reaches 73-75 rings of the pipeline to acquire reasonable grouting parameters and tunneling parameters, and step 2, conducting the pre-penetrating experiment when the notch ring reaches 76-78 rings of the pipeline to re-optimize acquired parameters to enable the same to be more reasonable; grouting before the experiment is proceeded each time.