The invention provides an icing detection blade system, a wind generating set and a blade control method. The icing detection blade system comprises a blade body, multiple icing sensors and a controller, the icing sensors are embedded on the edge of the blade body, are connected in parallel, and are connected with the controller, when it is detected that the blade body is iced, the icing sensors send icing signals to the controller, the controller generates icing alarm information according to the received icing signals, and generated icing alarm information is shown to a worker. According tothe icing detection blade system, the wind generating set and the blade control method, when a blade is iced, blade icing messages can be fed back to a worker in time, and the worker can clean ice onthe blade in time.