The invention discloses a method for acquiring three-dimensional permeability fields of netted fracture-cave oil reservoirs. The method includes: establishing a three-dimensional porosity field of a netted oil reservoir, and determining quantitative relation between porosity and permeability of the oil reservoir; acquiring equivalent permeability of flat and tubular fractures and caves, determining the minimal critical permeability value, subjecting the permeability of the minimal critical permeability value to truncation processing by taking the critical permeability value as the maximal value so as to obtain an equivalent permeability value; correcting the permeability field subjected to the truncation processing with a tracer agent and an interference testing result; correcting the permeability field by the aid of the numerical simulation method. The permeability acquired plays a decisive role in knowing oil reservoir developing rules, predicting oil reservoir yield, optimizing and adjusting production layers, optimizing and adjusting well patterns and well spacing, researching residual oil exploiting rules, profile controlling and water blocking, formulating gas injection and water injection schemes, exploiting cost of the oil reservoirs is reduced, exploiting efficiency of the oil reservoirs is improved, and the purpose of increasing economic benefit of oil reservoir exploiting is achieved.