The invention discloses a preparation method of farm-oriented biological bacterial fertilizer capable of remediating soil. The preparation method comprises the following steps that compound amino acidis prepared; compound biological viable bacteria are prepared, weighing, mixture, fermentation and filtration are performed, filtrate is split-charged and saved with a sterile tank, and then the farm-oriented biological bacterial fertilizer capable of remediating soil is obtained. The biological bacterial fertilizer can improve soil fertility and soil permeability, reduce the heavy metal contentof soil, promote plant root growth and improve fertilizer absorbing ability of plants.