The invention belongs to the field of assembly of electronic devices and provides a three-freedom-degree center oscillation platform. The three-freedom-degree center oscillation platform comprises a clamp, a Y-axis rotating and locating mechanism, a Z-axis rotating and locating mechanism and an X-axis rotating and locating mechanism, wherein the clamp is provided with a locating center, the Y-axis rotating and locating mechanism is used for driving the clamp to rotate around the Y axis with the locating center as the original point, the Z-axis rotating and locating mechanism is used for driving the clamp to rotate around the Z axis with the locating center as the original point, and the X-axis rotating and locating mechanism is used for driving the clamp to rotate around the X axis with the locating center as the original point. Through the clamp with the locating center, photoelectronic devices can be located in the locating center of the clamp when clamped and can be located conveniently; the Y-axis rotating and locating mechanism, the X-axis rotating and locating mechanism and the Z-axis rotating and locating mechanism drive the clamp to rotate around the Y axis, the X axis and the Z axis respectively with the locating center as the original point, the Y axis, the X axis and the Z axis are perpendicular to one another in three-dimensional space, and therefore accurate space adjustment of the photoelectronic devices can be carried out, perfect alignment of the photoelectronic devices can be realized, the manpower can be liberated, and the efficiency can be improved.