The utility model provides a heart first aid wrist -watch with automatically function of dosing, it includes the table body and watchband, the one side that the wrist is hugged closely to the watchband is equipped with rhythm of the heart sensor, should show internal be equipped with with the treater that rhythm of the heart sensor electricity is connected, show internal still be equipped with nitroglycerol injection component and with treater control connection be used for drive nitroglycerol injection component and accomplish the pneumatic component who injects, nitroglycerol injection component includes nitroglycerol sap cavity and the needle tubing of intercommunication in nitroglycerol sap cavity lower part, pneumatic component is including being located the gasbag that nitroglycerol sap cavity upper portion is used for driving the action of nitroglycerol injection component to and with this gasbag intercommunication and with treater control connection's air pump. The utility model discloses can solve the emergency treatment problem of the heart disease proruption loss of consciousness well, simple structure is practical, and it has carried out the structure integration with function blocks such as rhythm of the heart monitoring prevention, heart disease proruption treatment and wrist -watch, and the safety and stability has effectively improved cardiac patient's the probability of surviving.