Built-in storage tray frame capable of being thermally maintained

The invention discloses a built-in storage tray frame capable of being thermally maintained. A storage unit tray, a mainboard and a PCI_E are all arranged at the front end of a server. An upper layerU and a lower layer U are arranged in a case main frame body, and overturning frames are arranged at the rear part and the middle part of the storage unit tray; a plurality of uniformly arranged vertical plates are arranged on the overturning frames and the front part of the storage unit tray; brackets are arranged between a first guide plate and a connecting plate and between a second guide plateand the first guide plate. The storage tray frame is provided with at least two layers of front-row hard disk modules, middle hard disk modules and rear-row hard disk modules. A turnable first coverplate is designed between a front hard disk module and a rear hard disk module. During the maintenance of the middle row of modules and the last row of modules, the first cover plate is turned over tobe opened, and then the module to be maintained is turned over; the first cover plate is restored to the original position after the module is turned over in place; the cover plate makes contact withthe bottom of the hard disk module to form a closed air duct, the front module and the rotationally-lifted module have the same flow resistance after the closed air duct is formed, and the thermal maintenance effect is guaranteed.