The invention relates to a rapid scale forming device for an oilfield produced liquid ground surface system. The device comprises liquid inlet pipes, a plurality of filtrate pipes and scale forming assemblies arranged inside the filtrate pipes, wherein the plurality of filtrate pipes are arranged in arrays, zigzag liquid flow is formed between two adjacent connected filtrate pipes, and the filtrate pipes are of a heat tracing structure; the diameter of each liquid inlet pipe is smaller than that of each filtrate pipe, and the liquid inlet pipes are connected with the liquid inlet end of the first-stage filtrate pipe; the liquid outlet end of the last-stage filtrate pipe is connected with a liquid outlet pipe; a pipe cap is arranged at one end of each filtrate pipe and allows the corresponding scale forming assembly to be inserted and pulled; each scale forming assembly comprises a grid type bushing and a scale forming hanging element arranged in the bushing, and each scale forming hanging element comprises support bars, partition plates fixed on the support bars and filler hanging elements arranged between the partition plates. The heat tracing type scale forming device is adopted,so that the scale forming rate of the oilfield produced liquid can be increased, and operation is convenient as a result of the quick-mounting type replaceable scale forming assemblies.