The invention discloses a movable modularization treatment system which is applied on recovering processing of waste plastic and waste rubber and the like, belongs to the environment-friendly device range and a processing method. Each device is installed on a chassis or in a box body in groups to form movable units, each movable unit can be placed wholly on standard trailer or standard container to be transported to production fields, and then each movable unit can be connected and fixed to use in in-situ. The generation of dioxin is controlled and reduced through adopting the methods of desulfurizing and three-stage low temperature preheating, fusion and decomposition with negative pressure and low temperature and the like, the strict standard of dioxin discharge is reached after the filtering processing. Heavy oil and residue which are left in a cracking kettle are discharged to an oil residue separating tank of a finished product module from the lower portion through fusion and decomposition, heavy oil which is separated is transported to a preheating tank to be recycled. Oil residue which comprises oil can be used as raw material of modified asphalt. The device has flexible moving and lower operation cost, and is suitable to be operated in in-situ.