The utility model relates to a remote multi-well port chemical adding device of a cluster well array, which is applied on adding the chemical on well ports of cluster well array in an oil field. A pipeline and a ball valve are connected between a chemical adding box and a high-pressure measurement pump. 5-15 electromagnetic valves are connected with the pipeline on an outlet of the high-pressure measurement pump in parallel and one chemical adding port of the oil well is connected with the outlet of each electromagnetic valve by the pipeline. A check valve is connected with the pipeline between the outlet of the electromagnetic valve and the chemical adding port of the oil well. A pressure gauge is fixed on the pipeline on the outlet of the high-pressure measurement pump. A return valve is connected with the pipeline on the outlet of the high-pressure measurement pump and the pipeline connected with another end of the return valve is connected with the pipeline on the inlet of the high-pressure measurement pump. A control cabinet is connected with the high-pressure measurement pump and the electromagnetic valves by the conductor. A wireless transmitting antenna is arranged in the control cabinet. The control cabinet is wirelessly electrically connected with a remote control terminal. The remote multi-well head adding device has the following beneficial effects: the remote operation for adding the chemical in the oil field and the automatic collection of the chemical-adding data is realized, thus the chemical adding process on the well port in the oil field is more economical, the energy source is saved and the maintenance and management of the chemical adding is facilitated.