The invention relates to the technical field of oil coolers, in particular to a detachable-type oil cooler. The detachable-type oil cooler comprises an oil cooler body which is fixedly connected witha plurality of first cross plates and a plurality of second cross plates, and second vertical plates are vertically connected between the first cross plates and the second cross plates. The sides, close to the first cross plates, of the second vertical plates are fixedly connected with L-shaped plates, and the L-shaped plates and the second cross plates are fixedly connected with the oil cooler body through locking structures. The sides, close to the oil cooler body, of the L-shaped plates and the first cross plates are slidably connected with annular seats correspondingly. The annular seats are coaxially connected with sleeves, and mounting chambers are formed in the L-shaped plates and the first cross plates correspondingly. The other ends of the sleeves extend into the mounting chambers, and the other ends of the sleeves are fixedly connected with annular plates. The other sides of the annular plates are fixedly connected with a plurality of springs, and two positioning seats penetrate through the L-shaped plates and the first cross plates correspondingly through the annular plates. Through an arranged detachable structure, dismantling and maintaining for the oil cooler are facilitated, and the mounting cost is reduced.