Technology of preparing a liquid organo-mineral complex fertilizer based on solid waste, phosphogypsum waste and low-grade phosphorit (Mazydagy) by the ²method of the pit². It is established that under the pressure of 1.5–2.0 atm from these compounds the nutrients are distinguished along with this, bacteria, which parasitize in soil and plants are distructed. Thus, the liquid organo-mineral fertilizer complex is obtained which does not cause damage to of human health, as well as soil and plants. Use of the studied waste helps to preserve the ecological balance.