Making method of plastic pipe with line for pipeline detection

A manufacturing method of a conduit line survey pipe is provided to prevent physical property change of the pipe because the conduit line vessel designed is formed in the outer side of the pipe. A manufacturing method of a conduit line survey pipe comprises a step which inputs the fused synthetic resin material and extrudes it into the pipe shape; and a step which cools down the extruded pipe(100). In the cooling step, a printer is installed, wherein a main body(61) distanced from the extruded pipe and an arm(62) whereof one side is connected to the main body and the other side contacts with the extruded pipe(100) is installed are formed. A conduit line vessel(110) having the conductivity in the longitudinal direction of the cooled pipe is formed in the end of the arm.