Router signal automatic regulation method, router signal automatic regulation device and router

The invention provides a router signal automatic regulation method, a router signal automatic regulation device and a router. The router signal automatic regulation method comprises the following steps of: judging whether a terminal device connected with the router exists or not; when the terminal device connected with the router exists, judging whether signal strength of the terminal device is less than a preset threshold value or not; when the signal strength of the terminal device is less than the preset threshold, judging whether signal power of the router reaches the maximal level or not; and when the signal power of the router is less than the maximal level, increasing the signal power of the router. The router signal automatic regulation method, the router signal automatic regulation device and the router, provided by the invention, realize automatic regulation of the router signal when signal of equipment is weak, thus, regulation efficiency of the router is improved, and user experience is improved.