The utility model discloses an expandable combination cabinet, including cabinet, baffle and placing plate, the cabinet is fixedly installed with baffle in, the cabinet is connected with placing plate through the limiting structure, the cabinet outside top and bottom respectively install expansion structure and dehumidification structure, dehumidification structure includes dehumidification groove, dehumidification board, magnetic attraction frame and
metal baffle, the inlaying of magnetic attraction frame has in the dehumidification groove front side wall, the dehumidification groove front side has the
metal baffle through the adsorption of magnetic attraction frame, expansion structure includes expansion groove, first threaded hole, expansion board, fixed groove and fixed screw rod. That expandable combination cabinet, through dehumidification structure, it is convenient to carry out the damp of cabinet, avoid
moisture to immerse in the cabinet, influence cabinet service life, through expansion structure, it is convenient to expand the use area of operation platform, improve the flexibility and convenience of cabinet, through the limiting structure, it is convenient to dismouting placing plate to improve the utilization of cabinet.