The utility model discloses a box for diesel engine, the box is made by nylon, and the box includes shell and vertical interval lateral wall, and vertical interval lateral wall is located separating into first cavity and second cavity adjacent and that each other do not communicate in the accommodation space that the shell encloses and with accommodation space, being equipped with the diesel engine hole for hoist on the lateral wall of vertical interval, the diesel engine hole for hoist link up the interval lateral wall, is equipped with the recess that is used for fixation cabinet on the shell, is equipped with the silica gel pad in the recess. The utility model discloses a box is made by nylon, nylon materials light in weight, and toughness is good, can inhale to shake and prevent the fracture, has solved the all sorts of not enough of former iron sheet oil tank, the difficult phenomenon of shaking strong oil leak of nylon box, the utility model discloses a box includes two independent cavities, respectively as water tank and oil tank, has practiced thrift the required space of diesel engine installation greatly.