Closed cage for feeding SPF-level laboratory animals

The utility model discloses a closed cage for raising SPF-level laboratory animals. The pet cage comprises a cage bottom (2) and a cage cover (1) packaged at an opening of the cage bottom (2), the cover plate (5) is packaged at the opening of the cage cover (1); a limiting groove (13) is formed in the cage cover (1); the two ends of the periphery of the cage cover (1) are each provided with at least one limiting flange (14), bent vertical plates on the two sides of the cover plate (5) are each provided with an open hole (51) matched with the corresponding limiting flange (14), and the limitingflanges (14) are clamped in the open holes (51) after the cover plate (5) is embedded into the limiting grooves (13). The closed cage for feeding SPF-level laboratory animals effectively solves the problems that the interior of the cage is not well isolated from the external environment and the like. 本实用新型公开了一种用于饲养SPF级实验室动物的封闭笼子，包括笼底(2)、封装于所述笼底(2)开口处的笼盖(1)，以及封装于所述笼盖(1)开口处的盖板(5)，所述笼盖(1)上有限位凹槽(13)，所述笼盖(1)的外周两端各至少有一个限位凸缘(14