The invention relates to the technical field of auxiliary devices for automobile hub cover production, in particular to a spray coating device for automobile hub cover production. A hub cover can be stably supported on a placement frame, comprehensive spray coating is realized, spray coating effects are improved, and practicality is improved. Manual spray coating with a spray gun is avoided, long-time contacting of operating personnel with spray paint is prevented, influences on personal health are prevented, manpower is relieved, and reliability in use is improved. The spray coating device comprises a bottom plate, two groups of spray guns, an air pump, a fixing box, a first threaded pipe, a first threaded rod, two groups of left connection rods, two groups of right connection rods, a knob, an adjusting support plate, a left clamping rod, a right clamping rod, a left fixing rod, a right fixing rod, a left fixing ring, a right fixing ring, a left connection ring, a right connection ring, a connection spring, a left arc clamping plate, a right arc clamping plate, a top plate, an upper supporting plate, a left supporting plate, a right supporting plate, a toothed disc, a drive motor,four groups of upper connection columns and four groups of lower connection columns.