The invention discloses a bandpass filtering circuit and a multiplexer, wherein the bandpass filtering circuit comprises a first filtering circuit unit, a first circuit element, a second circuit element and a third circuit element, wherein the first filtering circuit unit comprises a first sound wave resonator and a second sound wave resonator which are connected in series; the first circuit element is connected with the first sound wave resonator in parallel; the second circuit element is connected with the second sound wave resonator in parallel; one first end of the third circuit element isconnected with the common connection end of the first sound wave resonator and the common connection end of the second sound wave resonator; the second end of the third circuit element is grounded, wherein the first circuit element and the second circuit element are both capacitive elements, and the third circuit element is an inductive element; or, the first circuit element and the second circuit element are both electrically inductive elements, and the third circuit element is a capacitive element. The bandpass filtering circuit and the multiplexer provided by the embodiment of the invention have the characteristics of high rejection and wide bandwidth.