As for mathematical truth, the contemporary discussion in the philosophy of mathematics is focused on dealing with the dilemma described by Paul Benacerraf. All kinds of different realism and anti-realism seeking out of this dilemma have been the most important theories in current researches. This paper tries to analyze the nature of Benacerraf’s Dilemma and show the weaknesses of contemporary different ways out of this dilemma. Based on above analysis, it concludes that the best way stepping out of this dilemma is the contextual realism, which can obviate the epistemological challenges from antirealism in reasonable way and illuminate further researches on mathematical truth.