The invention provides an automatic production line for phosphogypsum non-fired ceramsite balls. The automatic production line comprises a batching system and a ball forming machine; the batching system includes a phosphogypsum tank, a cement tank, a mineral powder tank and a mixer, the phosphogypsum tank, the cement tank and the mineral powder tank are all in communication to a mixer, the outletend of the mixer is connected to the ball forming machine, a water adding device is arranged on the upper part of the ball forming machine, the water adding device adopts a flow pump, and a water outlet of the flow pump is connected to an atomizing spray head. According to the automatic production line, the batching system is arranged to mix and stir phosphogypsum, mineral powder and cement; the ball forming machine is arranged, the flow pump and the atomizing spray head are arranged to make the materials be in full contact with water molecules in the ball forming machine and do centrifugal movement to form balls by mixing, automatic treatment is made in the full process, the ball forming effect is good, the labor intensity is low, and the production efficiency is high.