The invention discloses a device for continuously and collaboratively regulating the incident light and scattered light polarization direction for a micro-Raman spectroscopy. A transmission gear is respectively meshed with a driving gear and the large gear of a double-link gear. A half-wave plate and a polaroid gear are hollow gear rings, and the hollow circles thereof are respectively inlaid into a half-wave plate and a polaroid. The half-wave plate gear and the polaroid gear share the same center of circle. A transition gear is arranged between the small gear of the double-link gear and thehalf-wave plate gear, the polaroid gear is meshed with the large gear of the double-link gear, and two positioning gears are meshed with the half-wave plate gear and the polaroid gear. Being a box-like structure, the device is implanted into the public optical path of incident light and scattered light of the Raman spectroscopy, a manual turntable serves as a control part, variable speed transmission is implemented through the transmission and the rotation of the gear structure and the double-link gear, the polarizer angle of the half-wave plate and the polarization angle of the Polaroid are collaboratively controlled through one-step operation, so as to conveniently realize the continuous collaborative regulation of the incident light and scattered light polarization direction with high precision.