The present invention relates to a kind of manufacture prefabricated water tank be by being easily assembled room or building etc. at the construction field (site),It is necessary greatly in moisture holding capacity. Prefabricated water tank is designed to provide with excellent insulation capacity, processing performance and economic benefit are easily assembled room or building at the construction field (site) etc.,In moisture holding capacity, it is necessary to utilize medium weldbonding component greatly, it is sufficient to bear hydraulic pressure and be applied to inside, and be fixed on basal plane wherever it is necessary to damage for flashing. For this reason,It includes: that a kind of postposition unit (11) is located at bottom container wall that prefabricated water tank, which is formed as container shapes receiving water body,; A kind of wall formation container of built-in wardrobe (12); The cap unit (13) that boundary line is arranged in edge member (30) is located at top; Spacer (31) is by bearing edge parts space; Spacer is fixed at necessary interval in beam (32), both ends; Wooden plywood's part (33) fixes the function of light beam on an internal surface and as substrate with the built-in wardrobe (12); Wooden plywood's piece (33) that waterproof soldered elements (35) are fixed on all too busy to get away accessory inner surface forms wall member (12); Flashing means of deposition (35) are soldered to above-mentioned waterproof sheet (17), are made up with waterproof sheet welding of synthetic resin with the water for being placed in gap leakage with no high frequency to be supported of the flashing means of deposition by weld seam. ;The 2016 of copyright KIPO submissions
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