The invention provides a pipe-roof construction method and a steel pipe for construction. The pipe-roof construction method comprises the following steps that (1) a positioning steel pipe is pushed ina soft soil layer; and (2) steel pipe groups are separately pushed on the two sides of the positioning steel pipe. Spiral drill pipes are arranged in the steel pipe, close to the positioning steel pipe, of the steel pipe groups in the pushing process. The steel pipe comprises the positioning steel pipe and the steel pipe groups, female lock catches are arranged on the two sides of the positioningsteel pipe, and the steel pipe groups comprises first groups of steel pipe groups and follow-up steel pipe groups. Each steel pipe group comprises two steel pipes, male lock catches are arranged on one sides of the steel pipes, and female lock catches are arranged on the other sides of the steel pipes. According to the scheme, a single twist drill is adopted for unearthing, jacking of adjacent two steel pipes is realized, the construction progress is improved, and deformation of ground is small so as to prevent deviation of a jacking track.