The present invention relates to a PCB potting device with double resistance to overload impact, belongs to the technical field of potting devices, and solves the problems that an existing PCB has poor stability and reliability, a large volume and a complicated structure and does not meet the anti-overload impact requirement of the PCB. The potting device includes a bottom plate, a cover plate anda frame. The frame is arranged between the bottom plate and the cover plate, and is connected with the bottom plate through a buffer member. The frame comprises a cylindrical body and a supporting part; the PCB is arranged on the upper end face of the cylindrical body; the supporting part is higher than the upper end surface of the cylindrical body; and the cover plate is arranged at the top of the supporting part. The outer wall of the cylindrical body is provided with a connecting part, and the supporting part is connected with the cylindrical body through the connecting part. The inside ofthe cylindrical body is the first potting adhesive space, and the space surrounded by the supporting part and the cover plate is the second potting adhesive space. The invention has the advantages ofsimple structure, small volume, high stability and high reliability, and solves the problem of overload impact resistance of the PCB.