In order to study the size effect of the vibration response of socketed concrete pipes with different diameters under the action of blasting vibration，a numerical calculation model of the blasting dynamic multi-size pipes was established by the blasting test of the adjacent pipes on site and the verification of the vibration monitoring data. The characteristics of the blasting vibration response of socketed concrete pipes were analyzed based on the basic theory of dimensional analysis，considering the effect of pipesize，the prediction model of pipe blasting vibration velocity is established，combining with the dynamic tensile strength of concrete，and the control standard of blasting vibration speed of concrete pipes with different inner diameters is put forward. The results show that there is a time difference between the peak stress on the pipe body and the pipe socket. The peak stress on the pipe body is greater than that of the pipe socket. With the increase of the inner diameter of the pipe，the difference between the two peak stresses decreases gradually. Under the action of vibration wave，the peak particle velocity of concrete pipe decreases with the increase of the pipe's diameter.