The invention relates to the technical field of sewage treatment, in particular to wastewater pretreatment equipment. The wastewater pretreatment equipment comprises that a sewage precipitating cavitywith an upward opening is formed in a sewage treatment box; the lower part of the sewage precipitating cavity is partitioned to form a precipitate collecting cavity through a precipitating cavity partition plate which is arranged horizontally; the precipitate collecting cavity is provided with an opening positioned in the side wall of the right side of the sewage treatment box; a first precipitate collecting port which communicates with the sewage precipitating cavity and the precipitate collecting cavity is formed in the middle part of the precipitating cavity partition plate; a filtering mechanism body is arranged at the position of the sewage treatment box; the filtering mechanism body comprises a filtering mechanism shell arranged above the right side of the sewage treatment box; anda water inlet filtering grating is arranged in the filtering mechanism shell. The wastewater pretreatment equipment can treat solid pollutants in the sewage well.