A method for improving downlink transmission power, comprising: when a network side network element determines that a downlink subframe in a radio frame is an almost blank subframe, assigning a maximum value among numerical values corresponding to a user level parameter to the user level parameter, and assigning a maximum value among numerical values corresponding to a cell level parameter to the cell level parameter; and determining downlink transmission power according to the user level parameter value and the cell level parameter value, wherein, after determining the downlink transmission power according to the user level parameter value and the cell level parameter value, the method further comprises: the network side network element determining whether the downlink transmission power is greater than radio-frequency maximum power of the network side network element, and if the downlink transmission power is greater than the radio-frequency maximum power of the network side network element, assigning a secondary maximum value among the numerical values corresponding to the user level parameter to the user level parameter, and assigning a secondary maximum value among the numerical values corresponding to the cell level parameter to the cell level parameter; determining the downlink transmission power again according to the user level parameter value and the cell level parameter value; and sequentially cycling until the determined downlink transmission power is less than or equal to the radio-frequency maximum power of the network side network element. when a network side network element determines that a downlink subframe in a radio frame is an almost blank subframe, assigning a maximum value among numerical values corresponding to a user level parameter to the user level parameter, and assigning a maximum value among numerical values corresponding to a cell level parameter to the cell level parameter; and determining downlink transmission power according to the user level parameter value and the cell level parameter value, wherein, after determining the downlink transmission power according to the user level parameter value and the cell level parameter value, the method further comprises: the network side network element determining whether the downlink transmission power is greater than radio-frequency maximum power of the network side network element, and if the downlink transmission power is greater than the radio-frequency maximum power of the network side network element, assigning a secondary maximum value among the numerical values corresponding to the user level parameter to the user level parameter, and assigning a secondary maximum value among the numerical values corresponding to the cell level parameter to the cell level parameter; determining the downlink transmission power again according to the user level parameter value and the cell level parameter value; and sequentially cycling until the determined downlink transmission power is less than or equal to the radio-frequency maximum power of the network side network element. the network side network element determining whether the downlink transmission power is greater than radio-frequency maximum power of the network side network element, and if the downlink transmission power is greater than the radio-frequency maximum power of the network side network element, assigning a secondary maximum value among the numerical values corresponding to the user level parameter to the user level parameter, and assigning a secondary maximum value among the numerical values corresponding to the cell level parameter to the cell level parameter; determining the downlink transmission power again according to the user level parameter value and the cell level parameter value; and sequentially cycling until the determined downlink transmission power is less than or equal to the radio-frequency maximum power of the network side network element.