Electrolyte analyzer and test method thereof

The invention relates to an electrolyte analyzer and a test method of the electrolyte analyzer. The electrolyte analyzer comprises a control device, a sample suction pool, a sampling needle for sampling a reagent and a test device; the test device comprises an ion test item test device and a gas test item test device, the ion test item test device comprises an ion selective electrode module for carrying out the ion test item test and a first peristaltic pump for driving liquid drainage or sampling; the gas test item test device comprises a second peristaltic pump and a gas reaction pool for storing the sampling reagent; the first peristaltic pump is communicated with the ion selective electrode module through a passage of a multi-way valve, the second peristaltic pump is communicated with the sampling needle through another passage of the multi-way valve, and the control device comprises a main control unit, a first test control unit for controlling the ion test item test and a second test control unit for co