A healing abutment assembly for disposing on an implant by an auxiliary tool includes a healing abutment and a connecting member. A body includes an accommodating space, a healing surrounding surface, a top surface and a bottom surface. The bottom surface is connected to the implant. The healing surrounding surface is connected between the top surface and the bottom surface. The accommodating space is communicated with the top surface and the bottom surface. An outline of the top surface is formed in a non-circular shape, and the healing surrounding surface is formed in a non-conical shape. A positioning structure is disposed on the top surface and removably connected to the auxiliary tool. The connecting member is removably connected to the body and the implant. The connecting member is passed through the body and disposed in the implant so as to fixedly connect the body to the implant.
