The invention discloses a puff termination device for an electronic cigarette smoking machine. The device is characterized in that the device comprises a case, joints are respectively installed at the two ends of the case, a gas sample cavity is formed in the case, light source modules and light sensing modules are arranged between the outer side of the gas sample cavity and the case, the light source modules are electrically connected with the light sensing modules through cables, and the light sensing modules are electrically connected together through the cables. The puff termination device for the electronic cigarette smoking machine has the advantages that the usage is convenient, the application range is wide, and the device can be rapidly connected to any positions of a gas circuit which needs to experience smoke monitoring; a non-contact monitoring method is used, and the device has no disturbance for electrical cigarette smoke; the reliability and the integration level are high, the cost is low, and the function upgrading of an existing smoking machine is facilitated; according to different monitoring objects (mainly referring to colloid particle size ), the flexibilities of light source wavelength and a light sensing module are adjusted, and the application range of smoke production and termination indicators is not limited.