Noise-reduction environment-friendly road barrier

The invention relates to a noise-reduction environment-friendly road barrier which effectively solves the problems that an existing bridge road barrier is single in function and low in intelligent degree, and according to the scheme for solving the problems, a fixing part is included, a lifting plate is slidably installed in the fixing part, an expansion plate assembly is arranged on the side face of the fixing part, and a flow guide plate is arranged at the upper end of the lifting plate; sound-absorbing cotton is arranged on the lifting plate and the expansion plate assembly respectively; according to the scheme, the height of the barrier can be correspondingly adjusted according to the magnitude of wind power, noise generated by passing of vehicles can be well reduced on the premise that the safety of the barrier and a bridge structure is met, in addition, sound absorption cotton arranged on the barrier can be cleaned in strong wind weather, and it is ensured that the barrier has good sound absorption and