Composition capable of terminating emulsion polymerisation without generating nitrosamine

The invention belongs to the technical field of high-molecular synthesis, and relates to a composition capable of terminating emulsion polymerisation without generating nitrosamine. The composition comprises N-isopropyl hydroxylamine and multi-alkyl dithiocarbamate R1R2NCS2M. A specific technical method by employing the composition for the emulsion polymerization reaction includes the steps of: in a polymerization bath, firstly carrying out vacuum and nitrogen displacements on a polymerization reactor; adding soft water, soap liquid, an electrolyte solution, an emulsifier, a conditioning agent, styrene, and butadiene to the polymerization kettle, when the polymerization reactor temperature drops to 5 DEG C to 10 DEG C, adding an initiator for the polymerization reaction, when the conversion rate reaches 70 +/- 2%, adding a terminator, terminating the reaction, then carrying out flash evaporation and degassing, and forming a finished product rubber. The composition capable of terminating emulsion polymerisatio