The invention belongs to the field of oil and gas field development, and relates to a quantitative interpretation method for a tracer curve of a fracture-cave type oil reservoir. The quantitative interpretation method comprises the following steps of S1, classifying fracture-cave type oil reservoir interwell reservoir spaces; S2, establishing a fracture-cave type oil reservoir interwell tracer production curve interpretation model; and S3, fitting and solving an interwell tracer production curve to obtain parameters for quantitatively describing interwell communication characteristics. The method has stronger pertinence to the actual situation of a mine field; through the established curve fitting and solving method, quantitative characterization of the interwell communication parameters can be realized; and through taking the overall fit error of the production curve to the minimum as the target, a particle swarm algorithm is adopted to fit and solve the tracer production curve, so that the method has the beneficial effects of simpler operation and higher calculation precision, the error caused by manual input parameters in a past simulation method is reduced, and the practicability, the accuracy and the operability of the mine field are all effectively guaranteed.