In this paper, recycling technology of hot-in-place recycling bituminous mixture is studied by laboratorial orthogonal test. When fixing the amount and heating temperature of regenerant, as well as the texture and heating temperature of new mixture, the proportion and heating temperature, the mixing time and shaping temperature of the old mixture are selected as test factors. Various conditions of recycling technology in hot-in-place recycling are simulated by designing a L9 orthogonal Table for Marshall Test. Range Analysis Method is used to a...