The invention discloses a multifunctional vertical crushing regenerator comprising a base and a box body, wherein a vibration absorbing spring is arranged between the base and the box body, the upper part of the box body is provided with a feeding pipe, the bottom of the box body is provided with a discharging pipe, at least two-grade twisting devices which can crush and twist used casting sand are arranged in the box body from top to bottom, sieve nets are arranged between the two-grade twisting devices and between a final-grade twisting device and the discharging pipe, the fineness of the sieve nets is more and more thin from top to bottom, the position of on box body, which is opposite to the sieve net is provided with a sundry outlet pipe, the used molding sand enters the box body through the feeding pipe, is crushed and twisted by the twisting devices, and flows out of the discharging pipe. The multifunctional vertical crushing regenerator organically combines the steps of crushing, regenerating and sieving, thereby greatly lowering energy consumption, reducing occupation area, improving production efficiency, is provided with a dust removing interface to protect the environment and has simple and compact integral structure, reliable operation, convenient maintenance and low operating charge.