Positioning-adjustable circuit board tin spraying device

The utility model discloses a circuit board tin spraying device with adjustable positioning, which comprises a fixing mechanism, a positioning mechanism, a tin spraying mechanism and a purifying mechanism, the fixing mechanism comprises a fixing table, the lower side of the fixing table is fixedly provided with supporting legs, the upper side of the fixing table is provided with a collecting groove, the positioning mechanism comprises a supporting rod, and the supporting rod is fixedly connected with the tin spraying mechanism. The number of the supporting rods is four, fixing sleeves are connected to the outer sides of the supporting rods in a welded mode, connecting rods are connected between the fixing sleeves in a welded mode, sliding plates are movably installed on the outer sides of the connecting rods, the number of the sliding plates is two, and positioning pins are detachably installed on the front sides and the rear sides of the sliding plates; a fixing button is detachably installed on the upper si