The invention relates to the technical field of protective devices, in particular to an oil cooler protective device convenient to install. The oil cooler protective device convenient to install comprises a box body and an oil cooler body, a box door is hinged to one side of the box body through a hinged machine, a handle is mounted on one side of the box door, and a plurality of shock absorptionmechanisms are arranged at the lower end of both sides of the interior of the box body. A through hole penetrating through a straight plate is formed in the middle of the straight plate, L-shaped plates are fixedly connected to both sides of the lower end of the straight plate, and the lower end of the oil cooler body penetrates through the through hole and in contact with the lower end of the L-shaped plate. The oil cooler body is in clearance fit with the through hole, two limiting holes are formed in the one side of the outside of the box body, heat panels are arranged in the limiting holesin a clamping mode, and a plurality of fixing mechanisms are arranged on both sides of the heating panels. Two baffles are parallelly connected to both sides of the upper end of the box body in a welding mode, a plurality of positioning mechanisms are arranged on the two baffles, and two sets of limiting mechanisms are further arranged between the middle part of the protective plate and the upperend of the box body. The structure is stable, assembling and disassembling are convenient, and the protection effect of the oil cooler is good.