The invention discloses an industrial computer main case fixing seat, which comprises a shell and a base, the front and back of the shell are opened, the top of the shell is hinged with a cover plate, and the top of the base is provided with a guide sleeve The inner part of the guide sleeve is provided with a first spring, the bottom of the housing is provided with a guide column, one end of the guide column extends into the guide sleeve and the end is connected with a limit block, the shell The bottom of the body is provided with a bracket, the top of the bracket is fixedly connected with a support block, through holes are evenly opened on the left and right side walls of the housing, and compression rods are penetrated on the left and right side walls of the housing, so that One end of the pressing rod located inside the housing is connected with a pressing plate, the pressing rod between the pressing plate and the housing is provided with a second spring, and the pressing rod is located on the outer side of the housing. One end is connected with a limiting plate, which has high practicability and is suitable for wide promotion.