The invention relates to an auxiliary swimming device capable of being monitored and belongs to the technical field of swimming devices. The auxiliary swimming device is composed of a head floating plate, a middle floating plate, a hand floating ring and a foot module. Through the head floating plate, the middle floating plate, the hand floating ring and the foot module, temperature water pressure information is fed back while auxiliary swimming is implemented, safety is ensured, and the auxiliary swimming device brings inexhaustible fun; after a switch of the hand floating ring is switched on, signals are transmitted through a bluetooth transmitter of a wrist control module, a bluetooth receiver of a foot control module receives the signals, and a fan blade propulsion system is controlled to achieve a propulsion effect, so that a user saves labor during swimming. A belly induction module sends temperature and abnormal water pressure information to a carer's mobile phone, swimming safety is ensured, and the auxiliary swimming device is suitable for a beginner. A back structure and a front structure of the middle floating plate are different, to cooperate with postures of backstroke and freestyle and the like.