In　this　paper,　a　hybrid　method　of　phase　retrieval　and　off-axis　digital　holography　is　proposed　for　imaging　of　the　complex　shape　objects.　Off-axis　digital　hologram　and　in-line　hologram　are　recorded.　The　approximate　phase　distributions　in　the　recording　plane　and　object　plane　are　obtained　by　constrained　optimization　approach　from　the　off-axis　hologram,　and　they　are　used　as　the　initial　value　and　the　constraints　in　the　phase　retrieval　for　eliminating　the　twin　image　of　in-line　holography.　Numerical　simulations　and　optical　experiments　were　carried　out　to　validate　the　proposed　method.