The invention discloses a production method of an ecological bacterial fertilizer rich in polysaccharide, phosphate solubilizing bacteria, and potassium solubilizing bacteria. The production method comprises the following steps: (1) culturing trichoderma seeds; (2) performing fermentation culture; (3) carrying out enzymatic hydrolysis and extraction. Due to the enzymatic hydrolysis in the previous step, water contains a large amount of carbon sources and nitrogen sources that can be utilized; the dreg-containing hydrolysis liquid is extruded to obtain solids, the solids are dried and saved for later use; the liquid is modulated, the pH of the liquid is adjusted, then the liquid is introduced into a fermentation tank, bacillus mucilaginosus, bacillus subtilis or bacillus pumilus is inoculated to the liquid to carry out fermentation, then liquid is filtered to obtain bacterium bodies, the bacterium bodies are added into the dried solids, and then the mixture is blended and dried in the air (or dried at a low temperature) to obtain the ecological bacterial fertilizer.