We present the results of a three-year photometric study of the \delta Scuti star UV Trianguli .
Our data sets consist of 9378 differential measurements in Johnson V together with a few data collected into the Strömgren uvby \beta system .
UV Tri is at least a biperiodic variable .
The two best-fitting frequencies , f _ { 1 } =9.3298 d ^ { -1 } and f _ { 2 } =10.8513 d ^ { -1 } , are still not the complete set of pulsation frequencies representing the star ’ s light variations .
A suspected third frequency might present in the star .
Several “ anomalous cycles ” are observed in the light curves .
They seem real , but are aperiodic .
We derive the colour indices and physical parameters for the variable and conclude that it is a Population I \delta Sct star with normal metal abundance ( [ Me/H ] =0.0 \pm 0.1 dex ) evolving on its main sequence stage at an early evolutionary phase before the turn-off point .
Finally , we compare the observed oscillation frequencies with theoretical models .
The two pulsation modes of UV Tri are likely nonradial to be gravity modes .