The present invention provides a method for controlling mobile terminal network connection and a device thereof. The method comprises a step of obtaining a current time point and the current network state of a mobile terminal when the control event of mobile terminal network connection is monitored, a step of determining the expected network state which should appear of the mobile terminal at a present time point according to a preset time setting rule, a step of controlling the mobile terminal to switch to an expected networking state when the current time point is in a networking time period and the current network state of the mobile terminal is a network off state, and a step of controlling the mobile terminal to switch to an expected network off state when the current time point is in a network off time period and the current network state of the mobile terminal is a networking state. According to the method and the device, the mobile terminal is controlled to be in the networking state in the networking time period and in the network off state in the network off time period, and the problem of resource and flow waste caused by that the mobile terminal is always in the networking state at present is solved, and the consumption of power can be saved.