The invention discloses a children chest watch wearing device for sitting posture correction. The device comprises a chest watch and a wearing device body, the wearing device body comprises a back cushion and a seat cushion, the seat cushion is arranged on the inner side of the back cushion, an air bag is arranged in the back cushion, the seat cushion is designed as a negative pressure cavity, theair bag in the back cushion is connected with the negative pressure cavity of the seat cushion through a communication pipe, the back cushion is designed as an arc-shaped structure which is wide in middle and narrow on the two sides, elastic bands are arranged at the two ends of the back cushion, a row of buckling grooves are formed in the inner sides of the elastic bands, the chest watch comprises a hand disc and a connector which is connected with the hand disc through a connecting band, the connector is of a concave structure, and a connecting buckle is arranged on the inner side of the concave structure of the connector. The device has the advantages that by arranging the back cushion and the seat cushion communicated with the back cushion, a function of sitting posture correction isachieved, the buckling grooves are formed in the elastic bands, and the wearing of the chest watch is achieved. The device is simple in structure, convenient to operate, strong in functionality, and suitable for all children.