The invention discloses a method and system for securely playing live broadcast signals. The method comprises the following steps: a terminal player engine obtains a playing address of a live broadcast signal system and gasket address information of a gasket management system; the terminal player engine sends a playing request of a gasket proxy forwarding module, and the gasket proxy forwarding module starts a video signal playing proxy and sets gasket information; the gasket proxy forwarding module downloads gasket content information from the gasket management system into a cache of the terminal player engine in an asynchronous downloading manner; the gasket proxy forwarding module obtains a live broadcast signal from the live broadcast signal system and forwards the live broadcast signal to the terminal player engine; and the gasket proxy forwarding module sets a gasket stimulation time threshold, automatically plays a gasket video signal after the interruption of the live broadcast signal exceeds the gasket stimulation time threshold and restores to play the live broadcast signal after the live broadcast signal is normal. By adoption of the method and system disclosed by the invention, the secure playing of the live broadcast signals can be realized.