Medicine composition for treating solid tumors as well preparation method and application thereof

The invention provides a medicine composition for treating solid tumors, which is prepared from the following raw materials in proportion by weight: 1-4 parts of Na 131I and 5 parts of Na 125I. The invention also provides a preparation method and application of the medicine composition. The 131I in the medicine composition has a strong and transient function, the 125I has the characteristic of long half-life period (60 days), due to the addition of the 125I, the dosage of the 131I is reduced, environment pollution and protective difficulty are lowered, and the medicine composition can exert alocal radiation function for a long time to inhibit the recidivation and the metastasis of the tumors. The mixture of the 131I and the 125I enhances the energy of rays, extends the aging of the medicament so that the medicament can achieve the purposes of directional and continuous radiotherapy in the tumors and application as a tracer.