The invention discloses an integrated adjustment device for the spatial position during laser arc composite welding. The integrated adjustment device comprises a laser welding head adjusting device and a welding gun adjusting device. A laser welding head is connected with a connecting plate of the laser welding head adjusting device; the laser welding head connecting plate is connected with a leadscrew sliding block through a defocus amount adjusting mechanism, an angle adjusting mechanism and a horizontal adjusting mechanism sequentially; and a welding gun is connected with a gun clamping block through a front-back adjusting mechanism, an angle adjusting mechanism and a left-right adjusting mechanism of the welding gun adjusting device sequentially. Operation is easy and convenient, manufacturing is convenient, and the structure is reasonable; the defocus amount and the angle of a laser can be adjusted precisely and stably, the angle adjusting range is 0-90 degrees, and the positionof the welding gun in the three-dimensional space relative to a laser beam can also be adjusted precisely.