The invention discloses a pretreatment streamline for deep processing of minerals. The pretreatment streamline comprising a pedestal, a support is arranged at the upper side of the pedestal, the upperside of the support is fixedly connected with a crushing box, a feeding port is arranged at the upper side of the crushing box, two grinding wheels are rotatably connected in the crushing box, any end of each of the two grinding wheels penetrates through the sidewall of the crushing box, extends to the external of the crushing box, and is fixedly connected with a first gear, vortex strips are arranged on the inner sidewall of a screening wheel, a jet tube is arranged in the screening wheel, one end of the jet tube penetrates through the sidewall of the screening wheel, extends to the externalof the screening wheel and is fixedly connected to a water pump, one end, away from a hopper, of the screening wheel is positioned in the pedestal and is provided with a crude material chamber, the crude material chamber is communicated with a mineral chamber through a cavity, the mineral chamber is arranged in the pedestal, and the internal of the cavity is rotatably connected with a turbine rod. The streamline allows crushing, impurity removal, air drying and screening re-circulation processes to be fully-automatically completed without excessive people, so manpower is greatly saved, and the production cost is reduced.