Compared　with　in-line　digital　holography,　off-axis　digital　holography　can　be　used　to　image　more　kinds　of　objects　without　the　limitation　of　weak　phase　and　sparsity,　but　the　resolution　is　lower.　In　this　paper,　we　put　forward　a　high-resolution　iterative　reconstruction　algorithm　for　off-axis　holography　which　requires　only　the　recording　of　a　single　off-axis　hologram.　Interference　and　inverse　interference　processes　are　used　to　extract　the　object　wave　from　the　off-axis　hologram.　A　frequency　domain　filter　with　increasing　radius　is　used　to　improve　the　competitive　advantage　of　low　frequency　information　in　the　early　iterations,　while　retaining　the　high　frequency　information.　The　constraints　of　total　variation　and　positive　absorption　are　implemented　at　the　object　plane　to　enhance　the　robustness　of　the　algorithm.　Numerical　simulations　and　experiments　show　that　the　resolution　of　our　method　is　higher　than　traditional　off-axis　digital　holography.　In　addition,　it　is　suitable　for　phase　image　when　the　object　has　a　strong　phase　fluctuation,　as　well　as　for　imaging　dynamical　objects.