The present utility model provides a traction sheave, including: a traction sheave body, formed of several arc-shaped traction sheave sections that are connected to each other; and connecting portions, disposed at two ends of each traction sheave section along a lateral surface of the traction sheave section, where the connecting portions at the two ends of each traction sheave section fit each other. The traction sheave according to the present utility model has relatively high replaceability, is very convenient to assemble and disassemble, requires relatively low costs of human and material resources and time, and meanwhile can still ensure high reliability of working of the traction sheave.