House constructed from finished product components and constructing method thereof

A method for constructing a house comprising a finished product main frame, a finished product enclosed wall, a finished product floor cover plate, a finished product top cover plate, a finished product stair, wherein, the method comprising:

• step 1, individually forming multiple finished product composite prefabricated external wallboards in one piece at a manufactory;
• step 2, individually forming the finished product main frame, the finished product floor cover plate, the finished product top cover plate and the finished product stair in one piece at different manufactories;
• step 3, performing foundation construction of the house;
• step 4, installing the columns and beams of the finished product main frame;
• step 5, installing the finished product enclosed wall from assembling the multiple finished product composite prefabricated external wallboards onto the finished product main frame;
• step 6, installing a finished product top cover plate and finished product stair onto the finished product main frame.