The invention discloses a compound herbicidal composition and a granule thereof. The herbicidal composition is composed of: benzobicylon, pretilachlor and pyrazosulfuron-ethyl, wherein the mass ratioof the three components is (0.1-50):(5-70):(0.1-10). The granule is prepared with the herbicidal composition as active components and includes, by mass, 0.1-50% of the benzobicylon, 5-70% of the pretilachlor, 0.1-10% of the pyrazosulfuron-ethyl, 5-10% of a dispersant, 0-10% of a wetting agent, 0-10% of a disintegrant, 0-3% of a binder, 0-5% of an adsorbent, and filler added to 100%. The compound granule of the benzobicylon, pretilachlor and pyrazosulfuron-ethyl can be applied in one time, is extended in herbicidal spectrum and increased in application uniformity, is improved in effect and lasting time, is reduced in use amount and application cost, and is also reduced in environment pollution during application.