The utility model discloses an open -air soil mineralize mineralization sample collection device, including PVC pipe main part, set up in the lid of PVC pipe main part upper end, set up in the nonrust steel blade head of PVC pipe main part lower extreme, set up in the lid with sealing membrane between the last port of PVC pipe main part reach transversely set up in two metal handles of the left and right sides on the upper portion of PVC pipe main part, the lid nonrust steel blade head respectively with the upper end of PVC pipe main part reaches tip spiro union down, the top middle part of lid is provided with the through -hole. The utility model discloses change in the operation, operation process labour saving and time saving can accomplish the operation alone, and efficiency is higher for test progress. Simultaneously, sealing membrane is protected by the lid, and difficult quilt damages, has effectively improved the experiment success rate. Moreover PVC pipe body inserts the soil degree of depth and easily holds, can gather the soil data of the different degree of depth as required.