The invention provides an organic phosphonic acid and inorganic phosphorus-containing wastewater treatment technology belonging to the technical field of environment modification. The technology comprises the steps of: pretreating organic phosphonic acid and inorganic phosphorus-containing wastewater; feeding magnesia, calcium oxide, calcium hydroxide or mountain flour to remove the inorganic phosphorus and small part of the organic phosphorus in the wastewater; feeding an absorbing-coagulating agent; stirring; and filtering in a pressing way. The technology can be effectively used for removing the organic phosphorus-containing wastewater TP (tea polyphenols), thereby being simple and easy to operate, high in efficiency, and free of secondary pollution.