Provided is an anti-theft system for an outdoor tent and a tent thereof. The system comprises a tent body, at least one mobile terminal and a main wearable device establishing a wireless connection relationship with the mobile terminal. The operation mode of the system comprises the steps that: when a pull sheet of a zipper of the tent body is pulled from a first part to a second part and sprockets respectively connected to a first lead and a second lead are separated from each other, a circuit formed by the second part, the first lead, the second lead, a power supply device and a signal transmission device is in a switched-off state, the signal transmission device sends a switched-off signal to the mobile terminal, the mobile terminal generates switched-off information according to the received switched-off signal, and the switched-off information is sent to a processor through a first wireless transmit-receive module of the main wearable device; and the processor sends a control instruction to a controller according to the switched-off information, and the controller controls an LED lamp to be switched on according to the control instruction. According to the invention, the problem that an existing tent is relatively low in anti-theft performance is effectively solved.