The present invention relates to a suction-type portable atomizer. A suction nozzle is disposed at one end of a casing; and a liquid storage case with a storage cavity is disposed within the casing; one end of the liquid storage case is connected with an atomizing device. The atomizing device comprises an atomizing assembly including a suction nozzle holder and a heater; one end of the suction nozzle holder is provided with an atomizing cavity, and the other end of the suction nozzle holder is provided with an air vent intercommunicated with the atomizing cavity; the heater is fixed into the atomizing cavity. The atomizing device further comprises a liquid guiding assembly including a suction nozzle and a liquid guiding rope; one end of the suction nozzle is inserted into the storage cavity of the liquid storage case, such that liquid seal is formed at a contact part of the suction nozzle and liquid storage case; the other end of the suction nozzle is intercommunicated with the atomizing cavity of the suction nozzle holder; the liquid guiding rope is wound onto the heater, and two ends of the liquid guiding rope are guided into the suction nozzle. The present invention enables to guide the stored medicinal liquid uniformly onto the heater, providing an easy access to fresh medicinal liquid for a user.