The invention discloses a lightweight steel structure assembly type ecological toilet and a manufacturing method thereof and relates to the field of ecological toilets. The structure of the lightweight steel structure assembly type ecological toilet comprises an assembly type roof, assembled type walls, house and wall connecting pieces, a sanitary ware and ecological treatment system, a gas treatment system, a circuit control cabinet, an assembly type feces ecological treatment base, ground piles, pile seat connecting pieces, and wall seat connecting pieces. The manufacturing technique processes comprise the steps of project design according to the requirements, overall frame structure design, frame structure modeling input automation production, frame assembly by number, factory production according to a plate structure, decorative surface mounting and packaging and transporting to a construction site. The mounting technique processes comprise the steps that line drawing is conducted according to the requirements; the special ground piles are struck; the pile seat connecting pieces are welded; the assembly type feces ecological treatment base is assembled; the assembled type walls are assembled through the wall seat connecting pieces; and the assembly type roof is assembled through the house and wall connecting pieces. According to the ecological toilet, the construction period is short, traffic is not obstructed, and production efficiency is high.