The invention discloses a convenient-to-maintain machine case, which comprises a case body, wherein a case body opening is formed in the right side of the case body; a plurality of connection plates are fixed on the bottom surface of a top plate and the top surface of a bottom plate of the case body in the case body opening; a connection rod is sleeved with each connection plate in an inserting manner; each connection rod is sleeved with the corresponding connection plate in an inserting manner; a limiting part is fixed at one end, at the left side of each connection plate, of each connection rod; a spring sleeves each connection rod in an inserting manner; one end of each spring is fixed on the corresponding limiting part and the other end is focused on the left side wall of the corresponding connection plate; a case body cover board is pressed against the right end surface of the case body and covers the case body opening; a long through slot is formed in the position, corresponding to each connection rod, of the case body cover board; a vertical long slot is formed in the wall surface of the case body cover board at the right end of the long through slot; the vertical long slot is intersected with the long through slot; a long limiting block is arranged at the right end of each connection rod; and each connection rod is sleeved with the corresponding long through slot in an inserting manner. The case body cover board is convenient to disassemble and install; the installation and disassembly efficiency is greatly improved; and meanwhile, cooling is carried out by up and down ventilation.