An impact-type blood collecting apparatus (10), a negative-pressure blood lancet, and a blood collecting method. The impact-type blood collecting apparatus (10) comprises a base (11), a front cover (13), a needle base (14), a first flexible element (17), and an impact block (15). The impact block (15) at least comprises a first state of being attached to the tail end of the needle base (14) and a second state of being separated from the tail end of the needle base (14). The impact block (15) accumulates energy in the second state and is configured to move from the second state to the first state and then to drive by means of impacting the needle base (14) to move from a first position to a puncturing position. While the impact block (15) is moving to a to-be-triggered state, the needle base (14) is kept at the first position; this alters the technical concept in the prior art in which the state of the needle base (14) changes with an armed to-be-triggered state, thus shortening the travel of the needle base (14), and increasing puncturing stability and puncturing precision. During a process of replacing a disposable blood lancet (18), the needle base (14) is kept at the first position, thus preventing the flexible element from doing ineffective work, and favoring an extended service life of the blood lancet.
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