Automatic transportation assembly and automatic transportation method for gun heads, and pipetting system

The invention provides an automatic transportation assembly and an automatic transportation method for gun heads, and a pipetting system. The automatic transportation assembly comprises a box body, a moving part, a head part, a driving part and a blocking part. The automatic transportation assembly comprises a first state and a second state: in the first state, a head part protrudes out of the box body so as to load the gun heads, the box body does not make contact with a blocking piece, and a moving piece and the box body are relatively fixed and are driven by the driving part to move synchronously; and in the second state, the box body makes contact with the blocking piece and is stopped, the moving piece is driven by the driving part to move in the box body relative to the box body, the head part is made to contract towards the interior of the box body, and the gun heads loaded by the head part are unloaded. The automatic transportation assembly has the beneficial effects of high integration level and the