The invention discloses an intelligent door lock based on internet of things. The intelligent door lock comprises a front panel, a rear panel, a lock body and a lock core arranged inside the lock body, the lock body is slidably provided with a moving lock tongue and an anti-theft lock tongue, the anti-theft lock tongue is connected with a driving mechanism used for driving the anti-theft lock tongue to slide, and the lock body is internally provided with a charging device. According to the intelligent door lock based on the internet of things, in the process of locking a door, a sleeve rod pressure spring is compressed, elastic potential energy is formed for opening the lock, power consumption for opening the lock is reduced, and the endurance time of a battery is prolonged; and in the daily use process of the door lock, energy storage is performed on an energy storage volute spring, a minitype electric generator is driven to rotate by the elastic potential energy stored by the energystorage volute spring, charging on the storage battery is realized, the endurance ability of the storage battery is made to be improved, and the experience of users is improved.