The Upper Cambrian Gushan Formation in North China Platform is characterized by abundant deposition of flatpebble limestones(flatpebble conglomerates). The flatpebble  limestone refers to the socalled edgewiselimestone. Based on the systematic investigation of the sedimentology of the Gushan Formation at the Tangwangzhai Section，Shandong Province，8 rock types，namely calcareous shale，nodular micritic limestone，muddy banded micritic limestone，thinbedded micritic limestone，bioturbated micritic limestone，skeletal wackestonepackstone，oolitic grainstone，and flatpebble  limestone，have been recognized in  this formation，and have been grouped into 3 rock associations，which were deposited in the shaly basin，deep subtidal zone and shallow subtidal zone. The characteristics of pebbles and matrix and sedimentary successions indicate different provenances for the  pebbles and matrix，and suggest that flatpebble  limestones in the Gushan Formation were  originated from multiple sedimentary environments. Flatpebble  limestones in the Gushan Formation are grouped into 4 types according to their origins. 1)Both pebbles and matrix were probably formed in situ or transported only for a short distance; 2)Both pebbles and matrix were eroded and transported for a long distance from nearshore regions or experienced a sealevel rising process; 3)Matrix might be transported from nearshore regions，and mixed with pebbles and lime mud formed in situ; 4)Pebbles might be eroded and transported from micritic limestone on far offshore regions，and mixed together with matrix in situ，such as lime mud and skeletal grains.