The invention relates to a filter pressing spraying system. The filter pressing spraying system comprises a plurality of pairs of pressing plates of a filter press and further comprises a control unit, wherein a filter bag for filtering a reaction product is arranged between each pair of the pressing plates; a first channel through which washing liquid can flow is arranged on one side of each pair of the pressing plates; a plurality of spraying holes are horizontally formed in the middle range of at least one pressing plate; the washing liquid, which flows through the first channels, is used for washing the products in the filter bags from top to bottom; supplementing liquid flowing through the plurality of spraying holes is sprayed to the products from the middle range to be collected with the washing liquid; and the control unit is used for controlling the flow of the liquid passing through the first channels and the plurality of spraying holes. The filter pressing spraying system can work conveniently and is simple to operate; and an antioxidant can be added in a washing process and a full-automatic system control can be realized.