The invention discloses an assembling method of a plastic-wood house easy to assemble and disassemble. The assembling method includes a first step of connecting stand columns with foundation beams and
waist square-columns, a second step of connecting the stand columns with upper beams, wherein two connecting
modes are included, one mode is that L-shaped connecting pieces are adopted to connect and fix at corners, and the other mode is that T-shaped connecting pieces are adopted to connect and fix at wide surface extending junctions, a third step of connecting and fixing
eaves purlins and the upper beams, a fourth step of connecting short columns with the upper beams and
ridge purlins, a fifth step of enabling slope purlins to be respectively connected and fixed with the
eaves purlins and the
ridge purlins, a sixth step of installing and fixing house shingle panels on the slope purlins of a roof, a seventh step of installing plastic-wood square strips on the foundation beams and the
waist square-columns to make retention walls, an eighth step of installing external wall panels outside the retention walls, and arranging insulation boards on the inner sides of the external wall panels, a ninth step of fixing internal wall panels on keels of the external wall panels, and a tenth step of embedding lines, installing
doors and windows and carrying out decoration
processing. The assembling method of the plastic-wood house easy to assemble and disassemble enables a house to be tight in structure, high in firmness and accurate in sizes, and solves the problem of difficult connecting of plastic-wood technology. Moreover, the connecting pieces are hidden after connecting and do not influence appearance of the house.