A wearable horse cooling device has at least one cold water circulating module and a fixing module. Each one of the at least one cold water circulating module has a cooling unit, a wrap and a connection hose assembly. The wrap has a water bag and an air bag for generating a holding force. The connection hose assembly is connected between and communicates with each cooing unit and the water bag of the wrap. The fixing module is securely connected with each one of the at least one cold water circulating module and tied to the body of a horse to bind the cold water circulating unit on the body of the horse so that the cold water circulating unit can be firmly mounted and worn on the body of the horse without causing discomfort of the horse.
