A method for safely producing rice on moderate and mild heavy metal contaminated soil, comprising : applying a passivator before rice transplanting to reduce the activity of heavy metals in soil, and then spraying a foliar blocking agent during the period from the active tillering stage to the boot stage and during the grain filling stage. The passivator comprises bentonite, gypsum powder, lime, biochar, iron-based biochar, sustained-release iron-based biochar, iron-sulfur-silicon composite biochar, a heavy metal cadmium passivator for activating the activity of sulfur-reducing bacteria in rice field soil, a cadmium-arsenic synergetic passivator, etc. The foliar blocking agent is an acidic silica sol, a selenium-silicon composite sol, a cerium-silicon composite sol, a ferrous modified selenium sol, and the like. A nitrate nitrogen fertilizer can also be applied during the seedling stage, and/or a phosphorus-potassium fertilizer can be topdressed during the active tillering stage. The method allows for regulation according to the heavy metals absorption and accumulation rule of rice at different stages of rice growth, the technical measures have strong pertinence and remarkable effects, and standard production of rice fields having mild or moderate heavy metal contamination can be achieved.