The invention relates to the technical field of the double-pick-up-head, and particularly relates to a double-pick-up-head assembling method. The method obtains the offset angle of the actual optical axis through the center point, the center point of the chip and the center point of the spot, and then chooses two single camera components with the same optical axis offset angle to get together to obtain a double-pick-up-head assembly. The cost is low, and the obtained double-pick-up-head assembly is high in accuracy.