SECURITY LOCK

A security lock, comprising a bolt, a key cylinder (20), and a key (30). The key cylinder (20) comprises a main body (21), a cover (22), and a connection assembly (40). The main body (21) is provided with a channel (24). An electronic control assembly (50) and a mechanical control assembly (60) separately controlling motion of the connection assembly (40) are provided within the main body (21). The key (30) comprises an elongate portion (31) and a grip portion (32) fixedly connected to one end of the elongate portion (31). A power supply and a control chip mutually connected are provided within the grip portion (32). The elongate portion (31) is provided with bitting cuts (33) and a first contact member (34) for a connection to the control chip. During an unlock operation, the key (30) is inserted into the channel (24), the first contact member (34) is communicatively connected to the electronic control assembly (50), and the bitting cuts (33) press against the mechanical control assembly (60).