Xinjiang is the main battlefield, the forefront of China's grass-roots, in "3 period superposition" complex background, the research base of a line of police professional identity status quo, is not only beneficial to arouse the public security police work motivation, improve the work efficiency, is advantageous to strengthen police team strength and cohesion, in favor of the social stability and security of the maintenance of border areas. Study through the combination of questionnaire and individual interview method, a line at the base of 664 policemen were investigated, the results showed that: a line of security forces at the grass-roots level overall level is higher, the professional identity of different gender, age, marital status, fixed number of year of the public security work, launching and workplace security forces exist differences in professional identity and was statistically significant (p < 0.05); There were differences in professional identity among police officers of different educational levels, but there was no statistical significance (p>0.05). It is suggested that measures should be taken from individual, unit, organization, society and country level to further improve the professional identity level of grass-roots front-line police officers.