Flow analysis system capable of switching between bubble interval continuous flow and flow injection

The invention discloses a flow analysis system capable of switching bubble interval continuous flow and flow injection. A transmission part comprises an automatic sample introduction mechanism, a liquid introduction mechanism and a shunt electromagnetic valve. The analysis part comprises an FIA flow analysis mechanism, an SCFA flow path analysis mechanism, a detection mechanism and a data processing working unit. The FIA flow analysis mechanism is used for gradually and quantitatively injecting a liquid sample to be analyzed into the FIA flow analysis mechanism, and the SCFA flow path analysis mechanism is internally provided with at least one bubble adding device and at least one bubble removing device. And the detection mechanism is used for receiving the liquid sample treated by the FIA flow analysis mechanism and the SCFA flow path analysis mechanism, and obtaining the concentration of the substance to be detected by measuring a signal value. And the data processing working unit is used for receiving the