The utility model discloses a remolded soil disintegration testing apparatus. The remolded soil disintegration testing apparatus comprises a disintegration testing apparatus and a water replenishing device, wherein the disintegration testing apparatus is used to perform a disintegration test on a tested specimen; the water replenishing device is used to replenish water for the disintegration test; the disintegration testing apparatus comprises a stand, an electronic scale hoisted on the stand, a water container with the open upper part, and a hanging basket which is hoisted on the electronic scale and sunk in the water container; the tested specimen is installed in the hanging basket; the hanging basket is located under the electronic scale; the tested specimen is located in the middle inside the hanging basket; the water replenishing device comprises a water tank and a water replenishing pipe connected with the water tank; a water intake end of the water replenishing pipe is connected with a water outlet formed in the water tank; a water outlet end of the water replenishing pipe stretches into the water container; a ball float valve is mounted at the water outlet end of the water replenishing pipe; the ball float valve is located in the water container. The remolded soil disintegration testing apparatus disclosed by the utility model is simple in structure, reasonable in design, convenient to operate and good in using effect, and can solve the problems that the existing rock-soil disintegration testing instrument is complicated in structure, low in test precision and poor in using effect.