The rent of public rental housing is one of the important indicators for the guarantee object to weigh whether to apply for occupancy. At present, the public rental housing launched in many regions has encountered a "cold field". One of the important reasons is that the price of public rental housing is poorly matched with the income of the guarantee object. This poor matching performance is manifested in two aspects: one is that the rent level is generally high, and the other is that the undifferentiated rent lacks pertinence and cannot smoothly realize the docking with different levels of guarantee objects.