The utility model discloses a container skid-mounted type LNG filling device. An LNG storage tank, a pressurizing gasifier and an emptying heater are arranged in a hollow cavity in the left half part of a container type skid frame; valves, a pipeline system, an LNG submersible pump tank, a group of nitrogen cylinders, an explosion-proof control cabinet, an explosion-proof frequency transformer cabinet, an explosion-proof power supply cabinet, an unloading pressurizer, a gas filling machine and an explosion-proof wiring box are arranged in a hollow cavity in the right half part of the container type skid frame. According to the LNG filling device, all the technique and control devices are arranged in the container type skid frame, high integration and skid mounting of the LNG filling device are realized; not only is the structure compact and the occupied area small, but also the onsite construction workload is extremely small, cost reduction is facilitated and rapid arrangement can be realized; the container type skid frame adopts a container type frame structure, angular connecting elements are arranged at both the top and the bottom of the frame and the container type skid frame is convenient to lift, transport and move, is suitable for mobile emergent gas supply under emergencies and fixed gas supply within a small scope, and is favorable for popularization of LNG filling stations.