A spring type firing mechanism applied to an endoscope accessory includes a housing, a cap, a bottom cover, a driving module, a buffering module and a spring pipeline, and the spring pipeline includes a push-rod coupled to the sensor, and the driving module includes a firing spring and a restoring spring, and the two springs have different rigidities so as to form a reciprocating structure of the firing mechanism. After the sensor of the firing mechanism is triggered, the resilience of the restoring spring compresses the firing spring back to its firing length, so as to restore its position by a single driving point and allow users to complete the firing operation by one hand and simplify the operation of doctors to improve convenience and efficiency.
