The invention discloses a feeding grate of a garbage incinerator and the garbage incinerator. The feeding grate of the garbage incinerator comprises a feeding platform and a plurality of feeding trolleys abreast arranged on the feeding platform, the width of each feeding trolley at the two sides is smaller than that of the feeding trolley at the middle, and the feeding frequency of each feeding trolley at the two sides is larger than that of the feeding trolley at the middle. The feeding grate of the garbage incinerator has advantages that the large-capacity garbage incinerator grate is capable of greatly improving the economical benefit, to be specific, the construction land and cost are saved, the equipment cost is saved, the cost of the large-capacity incinerator feeding grate is much lower than that of several small garbage incinerator feeding grates with the corresponding capacity, and the mounting and debugging time and cost are less.