The new laws that were signed in over the past few months were designed by majority Buddhists, according to Cardinal Charles Maung Bo.
It requires interfaith marriages between Buddhist women marrying non-Buddhists to register their marriages in advance, as well as a new law regulating religious conversions.
The four laws also include a clause on population control, imposing "birth spacing" between pregnancies and laws on monogamy which punishes people with more than one partner.
He said: "We need peace. We need reconciliation. We need a shared and confident identity as citizens of a nation of hope," Cardinal Charles Maung Bo said in The Tablet.
He added: "But these four laws seemed to have rung a death knell to that hope."
The Cardinal said that: "Parliament was coerced by a fringe group of religious elite to enact four black laws, virtually fragmenting the dream of a united Myanmar.
"That these four bills were conceived not by the elected representatives of the Myanmar people, but by an extra-constitutional fringe element ... is a dangerous portend for the fledgling democracy."
Various human rights groups have spoken out against the new laws that they say risk destabilising the region ahead of November's general election.
Amnesty International claims they breach international human rights laws and are being enforced at a time of high religious tension and ethnic divisions.
"The passage of these laws would not only jeopardise the ability of ethnic and religious minorities in Myanmar to exercise their rights, it could be interpreted as signalling government acquiescence, or even assent, to discriminatory actions," said Sam Zarifi, the International Commission of Jurists' Asia Director.
"The introduction of these discriminatory bills is distracting from the many serious political and economic issues facing Myanmar today."
Cardinal Bo added: "Any effort to dilute the pristine image of Buddhism and its message of universal love needs to be resisted by all people of our nation.
"The four laws are a result of hatred.
"We urge our rulers and elected representatives to review these laws, which can turn out to be a toxic recipe for more decades of conflict."
