A separate-type blade angle adjusting mechanism comprises a shell, a worm gear and a rotation driving component; the worm gear is rotatably arranged in the shell; the rotation driving component is rotatably arranged in the shell and provided with a first rotation driving rod and a second rotation driving rod; the first rotation driving rod is positioned in the shell and provided with a worm part and a clamping part, wherein the worm part is engaged with the worm gear, and the clamping part is connected with the worm part; a shaft hole and two locating holes oppositely communicating with the shaft hole are formed in the clamping part; the top end of the second rotation driving rod is positioned in the shell and provided with a shaft part and two locating convex parts, wherein the two locating convex parts are oppositely arranged on the shaft part; the shaft part penetrates into the shaft hole of the first rotation driving rod; and the locating convex parts are clamped in the locating holes of the first rotation driving rod. Therefore, the first rotation driving rod and the second rotation driving rod can be self-assembled by consumers to be prevented from being damaged or damaging ablade in the packaging or transporting process.