The invention discloses a product gluing production line and a gluing angle adjusting mechanism thereof. The gluing angle adjusting mechanism comprises a base, an angle adjusting unit and a driving unit, wherein the angle adjusting unit and the driving unit are arranged on the base, and the driving unit is used for driving the angle adjusting unit to act so as to adjust the orientation angle of atool assembly positioned and fixed on the angle adjusting unit. The product gluing production line comprises a three-axis mechanical arm and a tool conveying mechanism used for conveying a tool assembly, a YZ axis moving mechanism of the three-axis mechanical arm is provided with a gluing mechanism, and an X axis moving mechanism of the three-axis mechanical arm is positioned below the tool conveying mechanism; and the X-axis moving mechanism of the three-axis mechanical arm is provided with a gluing angle adjusting mechanism. The product gluing production line and the gluing angle adjusting mechanism thereof simple and compact in structure, and the gluing angle adjusting mechanism is integrated in the product gluing production line; gluing at different angles is directly finished on the production line, online external gluing is not needed, cost is reduced, and operation is simplified.