The effects of linear heat input and focus position on the HE130 alloy laser weld shaping quality using solid Nd:YAG laser welding process with continuous wave were experimentally researched. The efficient laser welding linear heat input of HE130 alloy plates with various thickness were established through experiments and the relationship of the efficient linear heat input with the weld penetration and weld penetration/width ratio was quantified. The laser welding efficient linear heat input curve of HE130 alloy and the matching curve of laser power and welding speed in the range of different plate thickness were successfully made. The optimal focus positions while laser welding HE130 alloys with various thickness were experimentally acquired to get the optimal weld shaping including the larger penetration/width ratio and good rear shaping of the weld. The relationship between the plate thickness and the optimal laser focus position was then quantified and the optimal focus position curve was given.