The present invention relates to the field of inhalant devices, in particular, to an inhalant device that facilitates inhalation of inhalants into the deep lungs, comprising a casing, on which is provided a storage portion for placing a medicine storage tank and a patient The inhalation part for inhaling the medicament, the inhalation device also includes a threshold switch, the threshold switch has a braking state and an open state, and the threshold value of the threshold switch matches the negative pressure value generated in the inhalation part when the patient inhales the inhalation part, when the threshold value switch When it is in the braking state, the medicine is blocked, so that the patient cannot inhale the medicine at the inhalation part; when the negative pressure value generated by the patient's inhalation at the inhalation part is equal to or greater than the threshold value, the threshold switch changes from the braking state to the open state, And keep the open state, so that the patient can inhale the medicine through the inhalation part. In the scheme of the present application, the medicament can enter the lungs at a relatively high flow rate, which can achieve a good drug supply effect and treatment effect, and greatly reduce the risk of adverse drug reactions.