The utility model belongs to the technical field of university student's equation motorcycle race frame and specifically relates to an engine compartment of tube cage formula structure frame. This engine compartment includes that engine fixed portion, engine compartment anticollision subtotal engine compartment support the part, engine fixed portion be by under the engine on dead lever, the engine dead lever and engine supporting tripod constitute, the engine compartment anticollision partially be by on the engine compartment side under crash bar, the engine compartment side crash bar and engine compartment at the back the crash bar constitute, engine compartment support the part be by engine compartment side bracing piece, engine compartment side bearing diagonal pole and engine compartment at the back support rod set become, this engine compartment is favorable to improving university student's equation motorcycle race more and synthesizes the score, can realize the multiple spot fixed connection of engine, the installation is firm more, engine compartment is lighter, rigidity is big, be difficult to warp, safer, the structure is compacter, save space, cycle racing is light nimble more.