The invention relates to the field of garden tools, in particular to a splicing type fixing device which comprises a base and a splicing mechanism. A placement groove used for placing a flowerpot is formed in the center of the base. A sliding groove is formed in the bottom end of the base. The splicing mechanism comprises a sliding rod and a connection rod. The sliding rod is in sliding connection with the sliding groove. Connection holes are formed in the sliding rod. The two ends of the connection rod are provided with connection columns matched with the connection holes. The fixing device aims at solving the problem that in the prior art, the flowerpot needs to be continuously transported in order to guarantee pattern completeness and attractiveness, and accordingly the construction process is tedious. The splicing type fixing device is easy to operate.