Sample pretreatment device

The utility model belongs to the technical field of ion chromatography detection and analysis, and provides a sample pretreatment device which comprises a fixing support, pretreatment assemblies, injectors and a pressing plate, a plurality of fixing penetrating holes are formed in the fixing support, and the injectors are in inserted connection with the pretreatment assemblies in a one-to-one correspondence mode; the syringes and the correspondingly-connected pretreatment assemblies are arranged in the fixing penetrating holes in a penetrating mode in a one-to-one correspondence mode to be fixed, pistons of the syringes extend out of the corresponding fixing penetrating holes respectively, and the pressing plate is used for being arranged on the sides, opposite to the corresponding pretreatment assemblies, of the syringes so as to press the pistons of the syringes at the same time; after samples are assembled in the syringes respectively, the pressing plates are arranged on the sides, back on to the pretreatm