The utility model provides a what variably arouse angle integrates plasma -enhanced raman spectrum detection device, belongs to chemical detection analytical instrument technical field. By laser instrument, collimating lens, narrowband filter, variably arouse optics mechanism, nano particles and the basement of nanometer membrane coupling SERS at angle, long filter plate, focusing lens, optic fibre and the raman spectrometer of leading to to constitute. Based on the optics mechanism that should variably arouse the angle, collect lens through optics and match upward current portable raman spectrometer to and the SERS basement that has SERS signal enhancement and directional transmission nature, just can constitute one set and integrate the plasma -enhanced raman spectrum detection device. The device can realize arousing the continous transform of angle to the incident exciting light, satisfies the requirement that arouses of surface plasmon daughter, utilizes the nature of the directional transmission of plasma simultaneously, can realize the effective collection to orientation transmission SERS signal. The device conveniently carries, detection sensitivity, the insitu analysis of the quick monolayer level of specially adapted.