1. Diamond compounds and their use as herbicides. It also refers to the agrochemical components used for crop protection and methods of controlling poor vegetation. 1. Characteristic 1: in formula (1), r74919 and r758080 are independently selected；a. A group consisting of hydrogen, halogen, NS, no832222；C₁₋₆-alkyl, C₁₋₆-haloalkyl, OH, C₁₋₆-alkoxy, C₁₋₆-alkylthio, (C₁₋₆-alkyl) sulfinyl, (C₁₋₆-alkyl) sulfonyl, amino, (C₁₋₆ -alkyl) amino, di (C₁₋₆-alkyl) amino, (C₁₋₆-alkyl) carbonyl and (C₁₋₆-alkoxy) carbonyl； Rᵇ is selected from the group consisting of hydrogen, halogen, C₁₋₆-alkyl, C₁₋₆-haloalkyl, CN and C₁₋₆-alkoxy； Rᵈ is selected from the group consisting of halogen, C₁₋₆-alkyl, C₁₋₆-haloalkyl, CN and C₁₋₆-alkoxy, provided that Rᵇ or Rᵈ are C₁₋₆-alkoxy； R¹ is selected from the group consisting of H, OH, S (O) ₂NH₂,CN, C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, (C₃₋₆-cycloalkyl) -C₁₋₄-alkyl, C₁₋₆-alkoxy, (C₁₋₆-alkoxy) -C₁₋ ₆-alkyl, (C₁₋₆-alkyl) carbonyl, (C₁₋₆-alkoxy) carbonyl, (C₁₋₆-alkyl) sulfonyl, (C₁₋₆-alkylamino) carbonyl, di (C₁₋₆-alkyl) aminocarbonyl, (C₁₋₆-alkylamino) sulfonyl, di (C₁₋₆-alkyl) aminosulfonyl and (C₁₋₆-alkoxy) sulfonyl, wherein the aliphatic and cycloaliphatic parts of the aforementioned 14 radicals are unsubstituted, partially or completely halogenated, phenyl, phenyl-C₁₋₆-alkyl, phenylsulfonyl, phenylaminosulfonyl, phenylcarbonyl and phenoxycarbonyl,In the last six matrices, phenyl was not replaced or substituted with one, two, three, four or five identical or different substitutes selected from the halogen group,C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy and C₁₋₆-haloalkoxy； R² is selected from the group consisting of H, OH, S (O) ₂NH₂,CN, C₁₋₆-alkyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, (C₃₋₆-cycloalkyl) -C₁₋₄-alkyl, C₁₋₆-alkoxy, (C₁₋₆-alkoxy) -C₁₋ ₆-alkyl, (C₁₋₆-alkyl) carbonyl, (C₁₋₆-alkoxy) carbonyl, (C₁₋₆-alkyl) sulfonyl, (C₁₋₆-alkylamino) carbonyl, di (C₁₋₆-alkyl) aminocarbonyl, (C₁₋₆-alkylamino) sulfonyl, di (C₁₋₆-alkyl) aminosulfonyl and (C₁₋₆-alk
