The utility model provides a twin -lock round pin car front axle, includes preceding axle "I" -beam (1), the both ends of preceding axle "I" -beam (1) are provided with melon head (2), its characterized in that respectively: swizzle hole (3) have been offered perpendicularly on the last plane of melon head (2), are equipped with swizzle axle (4) that are connected with the knuckle in swizzle hole (3), and side chain shaft hole (5) have been offered to the side of melon head (2) and the inboard that lies in swizzle hole (3), and outside lock shaft hole (6) has been offered in the side of melon head (2) and the outside that lies in swizzle hole (3), and interior side chain shaft hole (5) and the outside are locked and be provided with the fitting pin axle in shaft hole (6) respectively, the utility model discloses improved twin -lock round pin car front axle's structure, realized the fixed of 2 lines behind the adoption twin -lock round pin structrual installation, improved the fixed effect of swizzle axle, effectively avoided the swizzle axle pine to appear and taken off to reduce displacement clearance and the friction of swizzle axle in the swizzle hole, prolonged the life of car front axle.