The invention provides an assembly-type toilet and an installation method thereof. The assembly-type toilet is characterized in that the assembly-type toilet comprises a toilet floor, a frame, wallboards and an integrated ceiling; the toilet floor and integrated ceiling of the whole toilet are designed as a standard module in the above scheme, and only simple splicing is needed at the site of thedecoration; the toilet floor is directly designed in the factory and only needs direct installation at the site; the integrated ceiling needs no boom and can be fixed directly by means of a top frameof the frame. The assembly-type toilet has the advantages of not involving wet installation during the whole process, having good neatness on site, only needing spicing on site according to instructions due to the fact that each module has completed standardized design and processing, and thus greatly improving efficiency of decoration and saving time.