The invention discloses a low voltage power load automatic controller. The controller comprises a base, wherein a control box main body is stuck at the upper end of the base; a control panel is installed at the upper end of the control box main body; a power conversion box is installed in an inner cavity of the control box main body; a low voltage box is installed in an inner cavity of the power conversion box; a load detection device is installed in an inner cavity of the low voltage box; power control devices are symmetrically installed in an inner cavity of the load detection device; power connecting devices are installed at the two sides of the load detection device; input and output connecting devices are installed at the sides, far from the load detection device, of the power connecting devices; start-stop devices are installed in inner cavities of the input and output connecting devices. The low voltage power load automatic controller has the beneficial effects that the controller is simple to use and convenient to install; users can well detect the use conditions of circuit lines in the using process; meanwhile, the controller can be convenient for the users to operate in the using process and has good practicability.