The utility model provides a reciprocating type hydraulic feeding fire grate. The reciprocating type hydraulic feeding fire grate comprises a sliding fire grate segment and a feeding trolley, and is characterized in that the sliding fire grate segment is formed by combining a feeding sliding fire grate segment and a feeding sliding block; the feeding sliding fire grate segment is fixedly arranged above the front end of the feeding trolley; the feeding sliding block is fixedly arranged below the bottom of the front end of the feeding trolley. The reciprocating type hydraulic feeding fire grate has the advantages that the fire grate segment is positioned through a pin shaft and a clamping block, a traditional bolt connection mode is changed, failure of a bolt caused by corrosion is prevented, and the reciprocating type hydraulic feeding fire grate is convenient to assemble and disassemble; the weight of the easily-abraded sliding fire grate sliding block, fixed fire grate segments and a finished sliding fire grate sliding block is lower than 15kg, the weight of the finished fixing fire grate segments is lower than 10kg, and replacement and maintenance are convenient.