The utility model relates to a polyolefin magnesium-titanium catalyst production residue treatment system which comprises a hydrolysis device, an oil-water separation device, a water granulated slag heating device, a first solid-liquid separation device, an oil removal device, a neutralization device, a second solid-liquid separation device, a steam stripping device, an evaporative crystallizationdevice, a magnesium removal device and an organic matter removal device, the hydrolysis device is communicated with the oil-water separation device; the oil-water separation device is communicated with the water slag heating device; the water granulated slag heating device is communicated with the first solid-liquid separation device; the first solid-liquid separation device is communicated withthe oil removal device; the oil removing device is communicated with the neutralizing device; the neutralization device is communicated with the second solid-liquid separation device; the second solid-liquid separation device is communicated with the steam stripping device; the steam stripping device is communicated with the evaporative crystallization device; the evaporative crystallization device is respectively communicated with the magnesium removal device and the organic matter removal device; according to the scheme provided by the utility model, residual chlorine-containing and titanium-containing compounds in the production process of the polyolefin magnesium-titanium catalyst can be reduced.