The invention discloses an adjustable crushing device for chrome ore. The adjustable crushing device comprises a crushing box, a crushing device, a grinding device and an adjusting device, wherein thecrushing device comprises crushing rollers; the pair of crushing rollers rotate in opposite directions through a driving device; the grinding device comprises a grinding wheel; the grinding wheel isrotationally mounted at the lower end of the crushing box through a grinding motor, and is positioned above a discharging opening; the adjusting device comprises supporting plates, a filtering plate and adjusting assemblies; the supporting plates are fixedly mounted at the lower end of the discharging opening; the filtering plate is arranged below the grinding wheel; the pair of adjusting assemblies is symmetrically arranged left and right; each adjusting assembly comprises an adjusting rod and a spring; the lower parts of the adjusting rods are in threaded connection onto the supporting plates; the springs are arranged at the upper parts of the adjusting rods in a sleeving manner; and one end of each spring is in contact with the filtering plate, and the other end of the spring is in contact with the middle part of the corresponding adjusting rod. The adjustable crushing device is simple in structure, not only realizes the efficient crushing of the chrome ore, but also elastically grind the chrome ore, and facilitates the gap adjustment between the chrome ore and the grinding wheel in grinding.