The invention relates to the technical field of blood analyzers, in particular to a structure for adjusting a
laser in three directions of an optical
assembly of a blood analyzer. Comprising an optical base, a
laser, a first connecting
machining part, a fixing
metal plate, a second connecting
machining part, an adjusting screw part, an adjusting plate, a pan head screw, a first combined screw, a second combined screw, a guiding pressing piece, a third combined screw and a sheath flow device component
assembly, the guiding pressing piece is used for limiting the
laser in the X-axis direction, the Y-axis direction and the Z-axis direction, and when one direction is adjusted, the other two directions are locked; and linkage is avoided. And displacement adjustment is carried out in cooperation with scales on the laser, the second connecting
machining part and the first connecting machining part, and the laser is rapidly adjusted to the design position of the
assembly body of the sheath flow device part. The number of debugging parts of an optical assembly of an old structure is 18, the number of the parts can be reduced to 14 through the structure for adjusting the laser, assembling of four parts is reduced, and the assembling and debugging time is shortened by more than 30 minutes.