The multi-color photometric light curves for a contact binary AV Puppis ( AV Pup ) in VR _ { c } I _ { c } bandpasses are presented , and they are analyzed by using of the 2013 version of the Wilson-Devinney ( W-D ) code .
The solutions suggest that AV Pup is a peculiar A-subtype W UMa contact binary with a high mass ratio ( q = m _ { 2 } / m _ { 1 } = 0.896 ) and a fill-out factor ( f = 10 \% ) .
Combining with our newly determined times of minimum with those collected from literatures , the orbital period changes of this system are investigated .
The O - C analysis shows that the orbital period of AV Pup is increasing at a rate of \mathrm { d } P / \mathrm { d } t = 4.83 \times 10 ^ { -7 } \mathrm { days yr ^ { -1 } } , which can be explained by mass transfer from the less massive component to the more massive one .